Published: October 2025 | Last updated: June 2026
Disclaimer: All load data referenced in this article is drawn from published manufacturer sources. Always consult a current reloading manual before developing any load. Start below published minimums and watch for pressure signs.
The Dillon RL 550C has been the reference-standard mid-range progressive press for a long time – long enough that an entire generation of serious reloaders built their first progressive loading workflow around it and never replaced it. The reason is straightforward: it’s the entry point into Dillon’s No B.S. lifetime warranty at a price below the XL 750, it handles over 160 calibers with the appropriate conversions, and its manual shellplate indexing – often mischaracterized as a limitation relative to auto-indexing presses – is a design choice that experienced precision rifle reloaders specifically prefer for the per-case control it provides.
At 400-600 rounds per hour without a case feeder, it’s not the fastest progressive press on the market. With a case feeder, that rate reaches 800+. But throughput is one metric among several, and the RL 550C’s combination of build quality, caliber range, No B.S. lifetime warranty, and manual indexing control produces a press that covers the needs of serious hobbyists and moderate-volume competition shooters better than any alternative at its price tier.
Understanding where the RL 550C fits – specifically how it compares to the XL 750 above it and the Hornady Lock-N-Load AP alongside it – is what determines whether this is the right press for your bench or whether you should step up or step sideways.
What’s in the Box
The Dillon RL 550C ships with:
- RL 550C press with 4-station toolhead (7/8-14 die threads)
- Automatic primer feed system – large and small pickup tubes, primer housing, slide assembly
- Powder measure with standard rifle and pistol charge bars
- Operating handle with ergonomic grip
- Toolholder with hex wrenches
- Spent primer collection bins (two)
- Loaded ammunition bin
- Printed assembly and operation instructions
What’s not included: dies, caliber conversion kits, a case feeder (optional upgrade), shellholders for specific calibers, or case lube. Each caliber requires a conversion kit – shellplate, locator buttons, powder funnel specific to the case head. Budget these as part of the total RL 550C investment.
The primer feed system included is the Dillon automatic tube-fed primer system – the same reliable design that has fed billions of primers through Dillon progressive presses. The pickup tubes handle small and large primers interchangeably. A Frankford Arsenal Vibra-Prime or similar tube filler makes loading the primer tubes fast and safe without direct primer handling.
Manual Indexing: Design Choice, Not Compromise
The RL 550C’s most frequently discussed specification is its manual shellplate indexing. After each complete press stroke, the operator advances the shellplate by hand to the next position. The Dillon XL 750 auto-indexes, the Hornady Lock-N-Load AP auto-indexes – and the RL 550C does not. This gets characterized as a limitation that the RL 550C overcomes through price advantage alone.
That characterization is wrong, and experienced reloaders know it.
Manual indexing is a deliberate Dillon engineering choice that provides specific advantages over auto-indexing for particular reloading applications:
Per-case control. With manual indexing, you advance the shellplate when you’re ready – after visually confirming the powder charge, after verifying the primer seated correctly, after checking that a bullet entered the case mouth correctly before seating. Auto-indexing advances the plate with the return stroke regardless of what you observed at each station. For a reloader who loads precision rifle rounds and wants to inspect each case at each station, manual indexing is the preferred mode of operation.
Tactile feedback on problems. A primer that’s not seated, a case that’s not fully indexed in the shellplate, a powder charge that looks different – all of these anomalies are more detectable when the operator is physically advancing the shellplate and has momentary control over the pace. Auto-indexing compresses the timing of these detections.
Learning advantage. A new progressive press user learns the process faster on a manual-index press because the pace is controlled by the operator rather than by the machine. Each step can be slowed, examined, and repeated before advancing. The RL 550C is described as an excellent learning press not despite manual indexing but because of it.
Double-advance prevention. A shellplate that advances twice in one cycle on an auto-indexing press – possible under certain jam conditions – can position a case under the wrong die with potentially serious consequences. Manual indexing makes this mechanically impossible.
For high-volume pistol production where the goal is rounds per hour and visual inspection per case is secondary to throughput consistency, auto-indexing’s speed advantage is real. For precision rifle loading and mixed-application benches where case inspection matters, manual indexing is the right design.
Build and Materials
The RL 550C’s frame is steel and cast aluminum with Dillon’s blue powder-coat finish. This combination – not pure cast iron like the Dillon RL 1100, but more robust than the lighter aluminum-dominant alternatives in its price tier – provides rigidity adequate for the full range of the 160+ calibers it handles, from 9mm Luger through 308 Winchester and up to 300 Winchester Magnum and comparable magnums with the Dillon Precision Belted Magnum Powder Measure.
The compound leverage linkage delivers consistent handle feel through the full stroke with minimal play. The precision-machined ram and shellplate operate with a smoothness that budget progressive presses don’t match – the difference between a well-maintained RL 550C and an equivalent-price alternative is immediately apparent through the handle.
The powder measure uses the Dillon Precision Case Activated Powder Measure Assembly – a case-activated design that only drops a charge when a case is present in the shellplate. If a case fails to advance properly and a shellplate position is empty when the measure station cycles, no powder drops into that empty position. This case-activation feature prevents double-charges and missed charges at the powder station, and it’s the same safety design that Dillon uses in the XL 750 and RL 1100.
The powder measure’s consistency with ball powders – the original article cites ±0.1 grain – is the standard that competition reloaders loading 9mm Luger or 45 ACP production loads depend on. With coarser flake or stick powders, a powder baffle is the standard addition for improved consistency.
Key Specs and Compatibility
| Feature | Specification |
|---|---|
| Frame Material | Steel and cast aluminum, Dillon blue powder coat |
| Stations | 4 |
| Indexing | Manual shellplate advance |
| Die Thread | Standard 7/8-14 |
| Caliber Range | 160+ pistol and rifle (no rimfire) |
| Magnum Capable | Yes, with Belted Magnum powder measure |
| Powder Measure | Case-activated, included |
| Primer System | Automatic tube feed, large and small |
| Case Feeder | Optional upgrade |
| Production Rate | 400-600 rph; 800+ with case feeder |
| Conversion Kits | Separate purchase per caliber |
| Mounting | 4-hole base; Dillon Strong Mount compatible |
| Warranty | No B.S. Lifetime (original owner, normal use) |
| Origin | Dillon Precision Products, Scottsdale, Arizona, USA |
The No B.S. lifetime warranty is the specification that most differentiates the RL 550C from everything in its price tier that isn’t made by Dillon. Dillon replaces defective parts without receipts, without arguments, and typically without charge, for the life of the press under normal use. The Dillon RL 1100 – more expensive and more capable in many ways – does not carry this warranty, making the RL 550C and the XL 750 the two Dillon presses where the No B.S. warranty is fully in force.
The 160+ caliber range with appropriate conversion kits is the RL 550C’s scope advantage over presses with proprietary shellholder systems. 9mm Luger, 45 ACP, 38 Special/357 Magnum, 40 S&W, 223 Remington, 308 Winchester, 6.5 Creedmoor, 30-06 Springfield, 300 Winchester Magnum, 300 Blackout – all are within the RL 550C’s caliber range with the appropriate conversion kit.
Four Stations: What They Accommodate
The RL 550C’s four stations accommodate the standard progressive loading sequence for pistol and rifle calibers:
Station 1: Full-length size and decap Station 2: Seat primer and expand case mouth
Station 3: Charge powder (case-activated measure) Station 4: Seat bullet with taper crimp
For 9mm Luger, 45 ACP, and most pistol calibers, this four-station sequence completes the round. The taper crimp in station 4 is combined with bullet seating, which works for semi-auto pistol rounds. For revolver rounds requiring a dedicated roll crimp separate from seating – 38 Special, 357 Magnum – the four stations can be configured with seating at station 3 and roll crimp at station 4, but a powder check die or factory crimp die doesn’t fit in the sequence without displacing a required operation.
For 223 Remington and 308 Winchester rifle loading, the four stations handle size/decap, prime/expand, charge, and seat. A separate crimping step for semi-auto rifle loads is often done as a fifth pass or the taper crimp die is run at station 4 in a post-seating position. Ball powders – Hodgdon CFE 223, Hodgdon Varget – meter consistently through the case-activated measure for 223 Remington production.
Where four stations reach their limit is in configurations that specifically need a powder check die alongside the full loading sequence. The Dillon XL 750 with five stations accommodates the full sequence plus a powder check die. The RCBS Pro Chucker 7 with seven stations accommodates even more. For reloaders whose die configuration specifically requires a dedicated powder check station, four stations is the constraint that pushes toward the XL 750.
Where the RL 550C Excels
Medium-volume pistol production with Dillon quality and warranty. 9mm Luger with Hodgdon Titegroup or Winchester 231 for practice runs, 45 ACP with Alliant Unique or Alliant Power Pistol for USPSA major, 40 S&W with Hodgdon CFE Pistol for IDPA – the RL 550C handles these at 400-600 rounds per hour with the case-activated powder measure’s safety advantage. For the best powders for 9mm Luger handloading and best powders for 45 ACP handloading, ball and flake powders meter most consistently through Dillon’s powder measure. The best bullets for 9mm Luger reloads and best bullets for 45 ACP reloads guides cover bullet selection for production use.
Precision rifle loading where manual indexing is the preferred approach. For 308 Winchester with Hodgdon Varget or IMR 4064, 6.5 Creedmoor with Hodgdon H4350, and comparable precision rifle calibers, the RL 550C’s manual indexing gives the operator individual case verification at each station. Reloaders who do systematic case weight sorting, primer pocket uniforming, and charge weight verification before seating will find the RL 550C’s manual pace more compatible with that workflow than auto-indexing alternatives.
Multi-caliber benches with separate toolheads. Pre-configured toolheads for each caliber reduce the 10-20 minute caliber change time to the time required for a toolhead swap, a shellplate change, and primer size adjustment. For a reloader who loads 9mm Luger, 45 ACP, and 223 Remington in a typical week, three pre-configured toolheads make the transitions practical within a single session.
First progressive press for a reloader transitioning from single-stage. The manual indexing’s per-case control and learning-friendly pace makes the RL 550C the most forgiving introduction to progressive reloading at this quality level. A new progressive reloader who starts on the RL 550C and understands why each station does what it does is better prepared to manage the process correctly than one who started on an auto-indexing press that advances before the inspection habit is established.
Magnum rifle loading alongside pistol. With the Dillon Precision Belted Magnum Powder Measure for large charges, the RL 550C handles 300 Winchester Magnum and 30-06 Springfield alongside the pistol calibers the same press loads for practice. This breadth – from 9mm Luger to 300 Winchester Magnum on the same press with caliber conversion kits – is the RL 550C’s most practically useful specification for a multi-caliber bench.
Realistic Limitations
Four stations limits complex die configurations. A full pistol sequence with a dedicated powder check die doesn’t fit in four stations. A separate roll crimp station for revolver calibers displaces another die. For reloaders who specifically need five or more stations for their die configuration, the Dillon XL 750 is the answer within the Dillon lineup.
Manual indexing limits maximum throughput rate. The 400-600 rounds per hour rate (800+ with a case feeder) is a real ceiling for a reloader who specifically wants the highest possible output per session. The XL 750 auto-indexing and the RL 1100‘s production rate both exceed what the RL 550C achieves. For reloaders loading 5,000 rounds per month and needing production speed, the RL 550C’s rate may not meet the requirement.
Case feeder is an additional purchase. Unlike the RL 1100 where the case feeder is standard, the RL 550C’s case feeder is an optional upgrade. The base press works manually – which is fine for learning and moderate volumes – but reaching 800+ rounds per hour requires the additional investment.
Caliber conversion cost. Each new caliber beyond the initial setup requires a conversion kit. For a bench that loads six calibers, the conversion kit cost accumulates. This is the same model as the XL 750 and RL 1100, but worth accounting for in the total cost calculation.
RL 550C vs XL 750: The Dillon-Internal Decision
For buyers already committed to Dillon, the RL 550C and XL 750 are the two presses where the No B.S. lifetime warranty is fully in force. The choice between them:
| Feature | Dillon RL 550C | Dillon XL 750 |
|---|---|---|
| Stations | 4 | 5 |
| Indexing | Manual | Auto |
| Powder Check Die Station | No room | Yes (5th station) |
| Case Feeder | Optional upgrade | Optional upgrade |
| Auto Drive Compatible | No | Yes |
| Magnum Capable | Yes | Yes |
| Price | Lower | Higher |
| Warranty | No B.S. Lifetime | No B.S. Lifetime |
The decision between them comes down to:
- Do you specifically need auto-indexing for throughput? XL 750.
- Do you specifically want the fifth station for a powder check die? XL 750.
- Do you want to add an auto-drive for near-automated production in the future? XL 750.
- Do you prefer manual indexing for precision rifle control? RL 550C.
- Does the price difference matter? RL 550C.
- Is a 400-600 rph production rate adequate for your volume? RL 550C.
For many serious hobbyist reloaders, the RL 550C’s manual indexing and four stations are exactly right – and the No B.S. warranty at the lower price point is the strongest possible argument for choosing the RL 550C over any non-Dillon alternative.
Setup and Mounting
Bench requirements. 2-inch or thicker hardwood, Grade 8 bolts through all four base holes with large washers, positioned at the bench edge for full handle arc and bin access. The Dillon Strong Mount – a heavy-duty elevated bench mount that raises the press for better ergonomic access and provides additional rigidity – is a worthwhile addition if your bench surface has any flex under production cycling.
Caliber conversion installation. Install the shellplate for your caliber, the appropriate locator buttons, and the powder funnel matching the case mouth diameter. Verify the shellplate indexes cleanly through all four positions with an empty case before installing dies. A shellplate that hangs or sticks on manual advance indicates an alignment or debris issue to resolve before running production.
Die setup. Set the sizing die following the how to tune a sizing die guide. Set the seating die following the seating die tuning guide. The Dillon Pistol Die Set carbide sizing die for pistol calibers, and the Dillon Rifle Die Set for rifle, are the natural companions. RCBS Pistol Die Set, Hornady Custom Pistol Die Set, and other standard 7/8-14 dies are all compatible.
Powder measure calibration. The Dillon Precision Case Activated Powder Measure activates only when a case is in the station – calibrate by charging 10 cases and weighing each on a powder scale. The RCBS Rangemaster 2000 or Frankford Arsenal Platinum Series at the bench covers this verification need. For overpressure considerations, charge weight verification is not optional at any production rate.
Primer system setup. Fill the pickup tubes with small or large primers using the Frankford Arsenal Vibra-Prime for safe, consistent loading. CCI 500 small pistol, Winchester WSP small pistol, CCI 300 large pistol, Winchester WLP large pistol, and CCI 400 small rifle are the most consistently feeding primers in the Dillon tube system.
Lubrication schedule. Light machine oil on the ram, the pivot points, and the primer slide mechanism before each session. The case-activated powder measure linkage gets a light wipe every 1,000 rounds. Keep oil away from the primer path and primer pickup area – oil contamination on primers affects ignition reliability.
Competitors – Four Direct Comparisons
Dillon XL 750
The Dillon XL 750 is the most direct Dillon-internal comparison, as covered in the RL 550C vs XL 750 section above. The XL 750 adds auto-indexing, a fifth station for a powder check die, and auto-drive compatibility. It costs more. Both carry the No B.S. lifetime warranty. For reloaders who specifically need five stations or auto-indexing’s throughput, the XL 750 is the right press. For reloaders whose four-station manual-index workflow is the preferred approach at the RL 550C’s price, the RL 550C is the answer.
Choose the RL 550C if: manual indexing is preferred for precision control, four stations cover your die sequence, and the lower price with No B.S. warranty is the target investment. Choose the XL 750 if: auto-indexing, the fifth station for a powder check die, or potential auto-drive compatibility are specifically required.
Hornady Lock-N-Load AP
The Hornady Lock-N-Load AP is the five-station auto-indexing alternative at a price between the RL 550C and XL 750. Hornady’s Lock-N-Load bushing system makes individual die changes fast. The LNL AP has a lifetime limited warranty. The RL 550C counters with Dillon’s No B.S. warranty – consistently better-supported in practice – and the manual indexing control that a significant portion of precision rifle reloaders prefer. For a reloader who wants five stations at a price closer to the RL 550C and prefers Hornady’s bushing die-change system, the LNL AP is the consideration. For a reloader who prioritizes Dillon’s warranty and service reputation, the RL 550C is the choice.
Choose the RL 550C if: Dillon’s No B.S. warranty and service reputation are the priority, manual indexing suits your workflow, and four stations accommodate your die sequence. Choose the LNL AP if: five stations and Hornady’s Lock-N-Load bushing system suit your workflow at a price point between the RL 550C and XL 750, and you’re comfortable with Hornady’s warranty terms.
RCBS Pro Chucker 5
The RCBS Pro Chucker 5 offers five stations with RCBS’s quick-change die plate system and RCBS’s lifetime limited warranty. The Pro Chucker 5 auto-indexes and uses RCBS’s own die plate approach rather than individual die changes. At its price, it sits between the RL 550C and XL 750. The RL 550C’s competitive advantage over the Pro Chucker 5 is Dillon’s No B.S. warranty terms – consistently better in practice – and the broader caliber range and parts ecosystem that 40+ years of Dillon manufacturing have produced. For a reloader already in the RCBS ecosystem who values RCBS’s die plate quick-change and auto-indexing, the Pro Chucker 5 is a direct alternative. For a reloader building a Dillon-centric bench, the RL 550C is the appropriate entry.
Choose the RL 550C if: Dillon’s warranty, service reputation, and parts ecosystem are the priority, and manual indexing is acceptable or preferred. Choose the Pro Chucker 5 if: RCBS’s die plate quick-change system, five stations with auto-indexing, and staying within the RCBS ecosystem are the priority.
Lee Load-Master
The Lee Load-Master is the budget comparison most relevant for a reloader deciding between spending more for Dillon quality or less for Lee’s feature set. The Load-Master has five stations, auto-indexing, and a removable turret for multi-caliber swaps. Its two-year limited warranty is shorter than the RL 550C’s No B.S. lifetime coverage. Its primer feed system requires more active monitoring and clean brass to run reliably. Its aluminum frame is less rigid under sustained heavy rifle sizing than the RL 550C’s steel and cast aluminum. For a reloader who has a hard budget ceiling that the RL 550C exceeds, the Load-Master provides five-station progressive capability at a lower price. For a reloader who can reach the RL 550C’s price, Dillon’s lifetime warranty and build quality represent a meaningful step up that pays back over years of sustained use.
Choose the RL 550C if: the investment in Dillon’s No B.S. warranty, build quality, and service ecosystem is within budget and is the priority. Choose the Load-Master if: budget genuinely constrains the decision to Lee’s price tier, and the additional five-station capability at Lee’s price is the appropriate tradeoff.
Comparison Table
| Feature | Dillon RL 550C | Dillon XL 750 | Hornady LNL AP | RCBS Pro Chucker 5 | Lee Load-Master |
|---|---|---|---|---|---|
| Stations | 4 | 5 | 5 | 5 | 5 |
| Indexing | Manual | Auto | Auto | Auto | Auto or manual |
| Frame | Steel + cast aluminum | Cast iron + aluminum | Steel | Die-cast aluminum | Cast aluminum |
| Case-Activated Powder | Yes | Yes | No | No | No |
| Die Change System | Toolhead | Toolhead | LNL bushing | Quick-change plate | Removable turret |
| Case Feeder | Optional upgrade | Optional upgrade | Optional upgrade | Optional upgrade | Included |
| Magnum Capable | Yes | Yes | Yes | 30-06 class | 30-06 class |
| Auto Drive Compatible | No | Yes | No | No | No |
| Warranty | No B.S. Lifetime | No B.S. Lifetime | Lifetime limited | Lifetime limited | 2-year limited |
| Price Range | $$$ | $$$-$$$$ | $$$ | $$$ | $ |
| Best For | Manual-control precision + volume | Auto-index + 5 stations | 5-station mid-price | RCBS ecosystem | Budget 5-station |
Troubleshooting
Primer tube not feeding consistently. Check primer compound buildup in the primer slide channel – this accumulates faster at higher production rates. Clean with a brush and compressed air every session. Verify the primer pickup tube is fully seated. Use dimensionally consistent primer brands: CCI 500, Winchester WSP small pistol; CCI 300, Winchester WLP, Federal 150 large pistol. Mixed brands in the same tube can cause feed inconsistency.
Powder measure throwing inconsistent charges. Ball powder bridging in the measure is the first check – a light tap on the hopper body before each stroke helps with finer ball powders. Verify the case-activation link is clean and moving freely. Check-weigh every 20-30 charges during a session. For stick powders with large grains (Hodgdon Varget for 223 Remington), check-weigh frequency increases because stick powders are more susceptible to measure variation than ball powders.
Shellplate not advancing cleanly on manual index. Check the detent ball spring for debris or wear. Clean the shellplate underside and the detent channel with solvent. A shellplate that requires more force than normal to advance indicates either debris in the detent area or a worn detent spring. Dillon customer service is the contact for replacement springs – this is exactly the kind of part the No B.S. warranty covers.
OAL variation across a batch. First check the seating die lock ring – it can loosen during initial setup and produce gradually increasing OAL if not re-checked and tightened after the first 20-30 rounds. Also verify the shellplate is indexing to the full position before the seating stroke – a partially indexed shellplate presents the case at slightly different heights at the seating station.
Case-activated powder measure not dropping on every case. If the measure misses a charge with a case present, the case-activation link may have debris preventing full travel. Clean the link mechanism and verify the case is fully seated in the shellplate at the powder station. An incompletely seated case may not actuate the link fully. Also check the powder funnel is properly seated in the die – a loose funnel can disrupt the actuation geometry.
What to Buy with It
Caliber conversion kits. Required for each caliber. The conversion kit includes the shellplate, locator buttons, and powder funnel specific to the case head diameter. Budget these as part of the total RL 550C investment – for two primary calibers, budget for two kits on day one.
Die sets. The Dillon Pistol Die Set with carbide sizing die for 9mm Luger, 45 ACP, and 40 S&W. The Dillon Rifle Die Set for 223 Remington and 308 Winchester. Standard 7/8-14 dies from any manufacturer – RCBS Pistol Die Set, Hornady Custom Pistol Die Set – are compatible.
Additional toolheads. One toolhead per caliber in regular rotation – pre-set with dies for each caliber, returned to the saved settings when reinstalled. The toolhead swap is the efficient caliber change method on the RL 550C.
Powder scale. The Frankford Arsenal Platinum Series Digital Scale or RCBS Rangemaster 2000 for charge weight verification at the start of every session.
Primer tube filler. The Frankford Arsenal Vibra-Prime for safe, consistent tube loading without direct primer handling.
Dillon Precision Case Activated Powder Measure. This is the standard powder measure that comes with the RL 550C, but having a calibrated spare configured for a secondary caliber saves recalibration time during caliber swaps.
Dillon Precision Belted Magnum Powder Measure. Required if you load 300 Winchester Magnum, 30-06 Springfield, or other large-capacity rifle calibers with charges above the standard charge bar’s range.
Case lube. For 223 Remington, 308 Winchester, and all bottleneck rifle cases. Not required for pistol carbide dies.
Dillon Strong Mount. If your bench surface has any flex, the Strong Mount’s elevated rigid base provides a significantly better mounting platform and improves ergonomics for extended sessions.
FAQ
Can the RL 550C load precision rifle calibers for long-range competition?
Yes. The manual indexing is the feature that makes precision rifle loading most natural on the RL 550C – the operator controls the pace and can inspect each case at each station. 308 Winchester with Hodgdon Varget, 6.5 Creedmoor with Hodgdon H4350, 6.5 PRC – these precision rifle calibers run through the RL 550C with the same case-by-case control that single-stage reloaders prefer for precision work, but at batch efficiency rather than single-stage speed.
What’s the actual warranty – is it really “No B.S. lifetime”?
Yes, for the original owner under normal use. Dillon replaces parts without receipts, without arguments, and typically at no charge for defects in materials, workmanship, and normal wear. This is confirmed by the original manufacturer and by the widespread user experience reported across the reloading community. Confirm current terms directly with Dillon Precision by phone or through their website for your specific unit.
Is manual indexing slower than auto-indexing in practice?
At sustained production rates on pistol calibers where the operator is loading as fast as possible, yes – auto-indexing eliminates one deliberate hand motion per cycle. In practice, the production rate difference at a comfortable pace is approximately 100-150 rounds per hour between a manual-index RL 550C and an auto-index XL 750 for an experienced operator. With a case feeder on the RL 550C, the gap narrows further because the case placement step – not the shellplate advance – is often the pacing constraint.
Why choose the RL 550C over the XL 750?
For a reloader whose four-station manual-index workflow matches their application, the RL 550C delivers No B.S. lifetime warranty at lower cost. The four-station limitation is only a constraint if you specifically need five. The manual indexing is only a limitation if you specifically need auto-index throughput. For many serious hobbyists and moderate-competition reloaders, neither limitation is a real constraint – making the RL 550C’s lower price at equivalent warranty terms the straightforward choice.
Can it handle large magnums like 300 Winchester Magnum?
Yes. The RL 550C handles 300 Winchester Magnum and comparable large-capacity belted magnums with the Dillon Precision Belted Magnum Powder Measure for the large charge bar requirements. This is an advantage the RL 550C shares with the XL 750 and holds over the RL 1100, which is limited to 308 Winchester class case lengths.
How long do caliber changes take?
With a separate pre-configured toolhead for each caliber, caliber changes take 10-20 minutes including the toolhead swap, shellplate change, primer size adjustment, and primer tube swap. With only one toolhead that requires die re-adjustment for each caliber, changes take significantly longer. The investment in additional toolheads – one per regularly loaded caliber – is the key to making multi-caliber operation practical within a single session.
Conclusion
The Dillon RL 550C earns its long-standing reputation as the reference-standard mid-range progressive press by delivering what serious reloaders actually need: Dillon’s No B.S. lifetime warranty at a price below the XL 750, 160+ caliber range with conversion kits covering everything from 9mm Luger to 300 Winchester Magnum, case-activated powder measure safety for the powder station, and manual indexing that gives precision-focused reloaders the per-case control that auto-indexing presses relinquish.
The four-station limitation is real for reloaders whose die configuration requires a dedicated powder check station. The manual indexing throughput ceiling is real for reloaders who specifically need the highest possible rounds per hour. For everyone else – the serious hobbyist, the moderate-competition shooter, the multi-caliber reloader who values Dillon’s service reputation – the RL 550C covers the production requirement with the best warranty in the progressive press category.
The upgrade path within the Dillon ecosystem is clear: the RL 550C as the entry to Dillon’s No B.S. warranty, with the XL 750 as the step up when five stations and auto-indexing become the specific requirements. Both carry the lifetime warranty. The RL 550C costs less.
Choose the Dillon RL 550C if you want No B.S. lifetime warranty coverage at the lowest price in the Dillon progressive lineup, prefer manual indexing for per-case control on precision rifle loading or for learning the progressive process, and four stations adequately cover your die configuration for your primary calibers.
Choose the Dillon XL 750 instead if auto-indexing, the fifth station for a powder check die, or future auto-drive compatibility are specifically required, and the additional cost is within budget.
Choose the Dillon RL 1100 instead if you load at commercial volume (5,000+ rounds monthly), specifically need the integrated primer pocket swager for military surplus crimped brass, and the 308 Winchester case length ceiling is not a constraint on your caliber range.
Choose the Hornady Lock-N-Load AP instead if five stations at a price between the RL 550C and XL 750 is the target, and Hornady’s Lock-N-Load bushing die-change system suits your workflow better than Dillon’s toolhead system.
Editorial note: Originally published October 2025, revised June 2026. The revision expanded all sections from list-format to full prose, added a dedicated section explaining manual shellplate indexing as a deliberate design choice with specific advantages for precision rifle loading rather than as a limitation, added a structured RL 550C vs XL 750 comparison table, expanded the No B.S. warranty explanation as the press’s defining differentiator at its price tier, corrected the original article’s understated warranty description, and added full internal linking throughout including powder pages, primer pages, caliber guides, die set reviews, and the full Dillon press lineup context.
