Published: May 2026 | Last updated: May 2026
Disclaimer: Specifications and pricing in this article are drawn from manufacturer and retailer sources current at time of publication. Always verify current pricing before purchasing.
Every powder scale – balance beam or digital – can drift. A balance beam scale’s pivot knife edges wear imperceptibly with use. A digital scale’s load cell accumulates offset error from temperature changes, vibration, and the slow creep of component aging. Without a verified reference weight to check against, the operator has no way to know whether the scale reading “41.5 grains” reflects an actual charge of 41.5 grains or a systematic 0.3-grain error that has developed since the last calibration. The RCBS Deluxe Scale Check Weight Set provides that reference: a set of precision weights in grain denominations chosen to match the charge weights reloaders work with, calibrated to a traceable accuracy standard and stored in a protective case that keeps them clean and undamaged between uses.
At a street price in the $45-65 range, this is not the cheapest way to verify a powder scale. A set of generic calibration weights from a laboratory supply source covers the same physical need for less money. What the RCBS set provides is convenience – the weights are in grain equivalents rather than metric units, the denominations are chosen to cover common powder charge ranges directly, and the case keeps them organized and protected on a reloading bench rather than mixed in with laboratory equipment. For the reloader who wants a dedicated scale verification tool that lives on the bench next to the scale and gets used regularly, the RCBS Deluxe set is a sensible purchase.
The set is appropriate for any serious handloader who relies on a powder scale for charge weight verification – whether that is a standalone balance beam like the RCBS M500, a digital bench scale like the Hornady M2 or Lyman Accu-Touch 2000, or the scale component of an automated dispenser like the RCBS ChargeMaster Supreme. The single buyer who should not spend money on this set is the handloader who uses only an automated dispenser for production pistol loading and never works with individual charge weights – for that workflow, the automated dispenser’s internal calibration is the relevant check, not individual grain weights.
Key Specifications
| Feature | Detail |
|---|---|
| Manufacturer | RCBS |
| Model | Deluxe Scale Check Weight Set |
| SKU | Not available at time of publication |
| UPC | Not available at time of publication |
| Weight Denominations | Typically 5 gr, 10 gr, 20 gr, 50 gr (grain equivalents) |
| Accuracy Class | OIML Class F1 or equivalent traceable standard |
| Material | Stainless steel (corrosion-resistant, non-magnetic) |
| Storage | Protective fitted case included |
| Traceable Calibration | Yes – weights calibrated to a traceable national standard |
| Compatible Scales | Any grain-reading powder scale |
| User Rating | Not available at time of publication |
| MSRP | Approximately $59.99 |
| Approx. Street Price | $45-$65 depending on retailer |
Why Scale Verification Matters and What Check Weights Do
A powder scale is only as trustworthy as its last verified calibration. Every scale in a reloading context is subject to drift from environmental conditions, mechanical wear, and accumulated use – and that drift is almost never dramatic enough to be obviously wrong. A balance beam scale that reads 0.3 grains heavy does not feel different in operation; the beam still balances, the indicator still centers. A digital scale with a 0.2-grain zero offset still displays a steady reading. The operator who trusts the scale without checking it against a known reference is loading every round with an unmeasured systematic error.
Check weights provide the reference. Place a known weight on the scale pan. If the scale reads that weight correctly, the scale is performing within its specification. If the scale reads 0.3 grains high, every charge thrown since the last correct calibration was 0.3 grains heavier than the display indicated. The check weight reveals the error; the operator can then re-zero, recalibrate, or adjust their target charge weight accordingly.
The RCBS Deluxe set uses weights calibrated to a traceable accuracy standard – meaning the weights themselves were verified against a reference that traces back to a national measurement authority. This distinguishes them from uncertified comparison weights, which may have been manufactured to a nominal grain value without independent verification. For a precision rifle handloader working at 0.1-grain resolution, an uncertified check weight that is itself 0.2 grains off provides no useful information. A traceable check weight provides a reference the operator can genuinely trust.
The grain denominations in the RCBS set are chosen to cover the charge ranges that reloaders work with:
- 5 grains covers light pistol charges – Hodgdon Titegroup 9mm loads, light 38 Special target charges, small-charge verification for fast powders
- 10 grains covers moderate pistol charges and light rifle charges – Alliant Unique .45 ACP loads, light 223 Remington charges
- 20 grains covers mid-range rifle charges – many 308 Winchester loads with medium-speed powders, 6.5 Creedmoor lighter charge nodes
- 50 grains covers heavy rifle and magnum charges – Hodgdon H4350 loads in 7mm Remington Magnum, 300 Win Mag charges, full magnum rifle charge weights
The combination weights – 5 + 10 = 15 grains, 10 + 20 = 30 grains, 20 + 50 = 70 grains, and so on – extend the verification range to cover any common reloading charge without requiring a weight for every possible denomination.
Build Quality and Design
The RCBS Deluxe Scale Check Weight Set uses stainless steel weights. Stainless is the correct material choice for this application: it is non-magnetic, which means it does not interact with any magnetic components in digital scale load cells; it is corrosion-resistant, which matters on a bench that may be exposed to solvent vapors and humidity; and it has stable density properties over time, meaning the weights do not change mass from surface oxidation the way plain steel or brass would.
The weights are cylindrical or disc-shaped, with a flat-bottom geometry that sits stably on a scale pan without rolling. The surface finish is smooth enough that powder residue and oils from handling do not bond to the surface – a dry wipe returns the weight to clean condition. The weights should be handled with tweezers or clean cotton gloves rather than bare fingers; skin oils transfer to the weight surface and, over time, can affect the weight’s measured mass at the level of a few hundredths of a grain. At the precision level of most reloading scales – 0.1-grain resolution – finger oils are not a practical concern, but at laboratory or high-precision analytical scale resolution, clean handling is a habit worth establishing.
The protective case is a fitted plastic or foam-lined container that holds each weight in a dedicated pocket. The case serves two functions: it keeps the weights from contact with each other during storage (contact scratches affect mass at the laboratory level, irrelevant at reloading scale resolution but good practice), and it ensures the operator can immediately identify if a weight is missing. A missing 10-grain check weight discovered mid-session is less disruptive than a missing weight discovered only when the case is opened for the next use.
Setup and Operation
Check weight verification is a simple procedure that should become a fixed part of every loading session startup routine.
Balance beam scale verification: Zero the scale with the pan empty and the beam balanced per the manufacturer’s procedure. Place the check weight corresponding to your target charge range on the scale pan. Read the beam indicator. If the scale reads the weight’s nominal value within the scale’s specification tolerance (typically ±0.1 grains for a quality balance beam scale), the scale is verified. If the reading is outside tolerance, check the scale zero, confirm the beam pivot is clean, and re-verify. A persistent reading error indicates a scale that needs service or replacement.
Digital scale verification: Zero the scale per the manufacturer’s procedure – most digital scales have a dedicated zero or tare function. Allow the recommended warm-up time (typically 3-5 minutes for most digital bench scales). Place the check weight on the pan. Confirm the reading matches the nominal weight within the scale’s specification. If the scale allows user calibration with a known reference weight, use the check weight as the calibration reference rather than relying solely on the manufacturer’s factory calibration.
For the RCBS Rangemaster 2000, Lyman Accu-Touch 2000, Lyman Pocket Touch 1500, Hornady M2, and Frankford Arsenal Platinum Series Precision Scale, the verification procedure is: power on, warm up, zero, place check weight, read. If the reading is within 0.1 grains of the nominal weight, proceed. If outside 0.1 grains, attempt recalibration per the scale manual. If the scale cannot be brought within tolerance with calibration, the scale needs attention.
Automated dispenser verification: The scale component of the RCBS ChargeMaster Supreme, RCBS Matchmaster, Frankford Arsenal Intellidropper 2.0, and Lyman Gen 6 can be verified the same way. Remove the powder cup or dispenser insert, place the check weight on the scale pan directly, and read. This verifies that the scale component is performing within specification independent of the dispenser mechanism.
Verification frequency is a judgment call. At minimum, verify at the start of every loading session. If loading conditions change – temperature shift of more than 10°F, moving the scale to a different surface, resuming after a long storage period – re-verify before loading. Competition shooters loading for a major match reasonably verify before every session and again mid-session if environmental conditions change.
Where It Fits – Use Cases
Precision rifle loading is where scale verification has the highest stakes. A handloader loading 6mm Dasher for PRS competition or 308 Winchester for F-Class is working to 0.1-grain charge resolution. A 0.3-grain systematic scale error in a 41-grain load represents a 0.7% charge weight deviation – not catastrophic for safety, but meaningful for consistency. Check weight verification at the start of every session is standard practice at this level.
Any reloader who owns a digital scale benefits from periodic check weight verification. Digital scales are subject to zero drift from temperature changes and load cell fatigue in ways that balance beam scales are not. A balance beam scale with worn pivot edges reads differently over time; a digital scale with a shifted zero offset reads consistently wrong in a way that is harder to detect without a reference. The RCBS check weights provide that reference for both scale types.
Multiple-scale setups – a primary digital scale for load development and a secondary balance beam scale as a cross-check – benefit from having a single reference set that verifies both instruments. Rather than trusting that two scales agree with each other (which only confirms they are equally wrong if both have drifted), verify each independently against the check weights.
Reloaders who have inherited or purchased a used scale should verify it against a known reference before trusting it. A scale that has been dropped, stored improperly, or used heavily without maintenance may have accumulated error that is not obvious from inspection. The first use of the RCBS check weights on a used scale either confirms it is performing correctly or reveals a problem before it causes bad ammunition.
The check weight set adds no value for the handloader who does not own a separate powder scale – who charges exclusively from a progressive press measure without individual charge verification. That workflow has its own quality control mechanisms (powder check dies, visual inspection) that do not involve a scale at all.
Competitive Analysis
RCBS Deluxe Scale Check Weight Set vs. Generic Laboratory Check Weights: Laboratory supply companies sell calibration weight sets in metric denominations to OIML accuracy standards at prices that are often lower than the RCBS set. The practical difference is convenience: metric weights require the operator to calculate grain equivalents (1 gram = 15.432 grains), which adds a mental step to every verification. The RCBS set uses grain-denominated weights that correspond directly to reloading charge weights. For a handloader who owns and uses laboratory weights already, buying the RCBS set is redundant. For a handloader who wants a bench-dedicated set in reloading-relevant denominations, the RCBS set’s grain denomination convenience is worth the modest price premium. Choose the RCBS Deluxe set if grain denominations and bench-specific packaging are priorities. Choose generic laboratory weights if you already own them or want to minimize cost without caring about denomination format.
RCBS Deluxe Scale Check Weight Set vs. Hornady Scale Check Weight Set: Hornady produces a comparable check weight set in grain denominations, typically at a similar price point and aimed at the same reloading scale verification market. Both sets use stainless steel weights and cover the common reloading charge range. The choice between them is primarily one of brand preference and availability. Reloaders in the RCBS ecosystem who run an RCBS M500 or RCBS Rangemaster 2000 have a natural reason to choose the RCBS set for brand consistency. Choose the RCBS set if you are in the RCBS ecosystem. Choose the Hornady set if you run Hornady scales and prefer matched branding – the performance difference is negligible.
RCBS Deluxe Scale Check Weight Set vs. No Check Weights – Using Powder as a Reference: Some reloaders verify their scale by throwing a known charge with a trusted powder measure and checking it on the scale, or by measuring a weighed quantity of a reference material. Neither approach provides a traceable reference. A powder measure that throws a consistent charge only proves the scale reads consistently – not that it reads correctly. The only reliable scale verification is a certified reference weight of known, traceable mass. Using powder or any other non-certified material as a “check weight” substitutes circular validation for actual verification. Choose the RCBS check weights if accurate charge weight is important to your loading quality. Do not substitute powder or other materials as reference weights.
RCBS Deluxe Scale Check Weight Set vs. RCBS ChargeMaster Link or Supreme with Internal Calibration: Automated dispensers with user-accessible calibration functions allow the operator to calibrate the scale component using a known reference weight. The check weight set is the reference weight for that calibration – the two products are complementary, not alternatives. A handloader who runs an RCBS ChargeMaster Link and performs the recommended periodic user calibration procedure needs a verified reference weight to do so correctly. The check weight set provides it. Choose both: the automated dispenser for production loading efficiency, the check weight set for verified calibration of the dispenser’s scale component.
Comparison Table
| Feature | RCBS Deluxe Scale Check Weight Set | Hornady Scale Check Weight Set | Generic Lab Metric Weights | Uncertified Check Weights |
|---|---|---|---|---|
| Weight Denominations | Grain (5, 10, 20, 50 gr) | Grain (varies by set) | Metric (mg, g) – requires conversion | Grain or metric (varies) |
| Traceability | Yes – certified to national standard | Yes – certified | Yes (if OIML-certified set) | No |
| Material | Stainless steel | Stainless steel | Stainless or brass (varies) | Varies |
| Storage Case | Yes – fitted case included | Yes | Varies | Varies |
| Reloading-Specific Denominations | Yes | Yes | No – requires conversion | Varies |
| Brand Ecosystem Fit | RCBS scales and tools | Hornady scales and tools | Brand-agnostic | Brand-agnostic |
| User Rating | N/A | N/A | N/A | N/A |
| Price Range | $45-$65 | $40-$60 | $20-$45 | $10-$25 |
Troubleshooting
Scale reads outside tolerance when check weight is placed, but the scale was zeroed before the check. First confirm the check weight itself is clean – a finger smudge or powder residue on the weight surface shifts the reading by a small but detectable amount at high-resolution scales. Wipe the weight with a clean dry cloth and re-check. If the reading remains outside tolerance, attempt the scale’s recalibration procedure per its manual. A persistent out-of-tolerance reading on a scale that was previously accurate indicates either a load cell problem (digital scale) or a mechanical issue (balance beam scale) that requires service.
Check weight reads differently between the digital scale and the balance beam scale. Two scales reading the same reference weight differently is the expected outcome if either scale is out of calibration. The check weights are the reference, not the scales. Recalibrate whichever scale reads outside its specification tolerance. If both scales read within their individual specifications but differ from each other by more than 0.1 grains, the scales are at opposite ends of their tolerance ranges – acceptable, but worth noting.
A check weight appears to have changed mass compared to a previous session. The weight has been contaminated, damaged, or is being compared to a session where the scale itself had drifted. Clean the weight thoroughly with a dry cloth and handle with tweezers going forward. Re-verify with a known external reference if contamination is suspected. Physical damage – a dent or scratch – does not significantly affect mass for reloading-resolution purposes, but a weight that has been chemically treated or has significant surface corrosion should be replaced.
Scale reads the check weight correctly, but loaded rounds weigh inconsistently on a second scale check. The scale is performing correctly; the inconsistency is in the powder measure or trickler, not the scale. A scale that passes check weight verification and then shows variable thrown charge weights is telling you the charging tool is the variable. Investigate the powder measure’s technique and mechanism rather than the scale.
Case insert or storage foam in the check weight case has deteriorated, exposing weights to contact with each other. Replace the case or add individual small plastic bags for each weight. Weights in contact with each other over time can develop micro-contact marks that, while irrelevant at reloading scale resolution, reduce the storage life of the set and suggest inadequate protection during storage and transport.
Frequently Asked Questions
How often should I verify my powder scale with check weights? At minimum, at the start of every loading session. A scale that was correct yesterday may have drifted from a temperature change overnight, a bump during storage, or zero creep in a digital load cell. Competition shooters loading for consequential matches commonly verify at session start and again if loading conditions change significantly. Two minutes of scale verification at the start of a session is cheap insurance against a systematic charge weight error across hundreds of rounds.
Can I use these weights to calibrate my RCBS ChargeMaster Supreme or Frankford Arsenal Intellidropper 2.0? Yes, if those dispensers have a user-accessible calibration function that accepts a known reference weight. Place the check weight on the dispenser’s scale pan and follow the calibration procedure in the dispenser’s manual. The traceable accuracy of the RCBS check weights makes them an appropriate calibration reference for any grain-reading powder scale.
Why are the weights in grain denominations rather than metric? Powder charges in American reloading are measured in grains. A 50-grain check weight places a known load on the scale that corresponds directly to a heavy rifle charge – the operator immediately understands the relevance. A 3.24-gram weight (50 grain equivalent) requires a mental conversion step every time it is used. For a scale that reads in grains, grain-denominated check weights are the straightforward choice.
Are these weights accurate enough for verifying an analytical scale like the A&D FX-120i? The RCBS Deluxe weights are calibrated to a level appropriate for reloading powder scales, which read to 0.1 grains (approximately 6.5 mg). An A&D FX-120i analytical scale reads to 0.02 grains (approximately 1.3 mg) and requires OIML Class E2 or F1 weights for verification at its full resolution. RCBS check weights are appropriate for reloading bench scales; for analytical laboratory scales used with Auto Trickler systems, verify weight accuracy class against the scale manufacturer’s calibration requirements before purchase.
What should I do if a check weight is lost or damaged? RCBS sells replacement weights for their check weight set through their customer service channel. Individual replacement weights are available so a complete set does not need to be repurchased if a single weight is lost. Contact RCBS customer service with the set model number for current replacement part availability.
Is there a meaningful difference between the RCBS Deluxe set and the standard RCBS check weight set? The Deluxe designation typically indicates a broader denomination range and a higher-quality storage case than the standard set. Confirm which denominations are included in each set before purchase – the Deluxe set’s value comes from covering the full practical charge weight range with a single purchase. If the standard set covers all the denominations you use, the Deluxe set offers little additional benefit.
Conclusion
The RCBS Deluxe Scale Check Weight Set is a simple, well-executed accessory that addresses a verification gap that many reloaders do not close until a problem surfaces. A powder scale that has never been checked against a traceable reference is an assumption, not a verified instrument. The set provides that reference in grain denominations relevant to reloading, stored in a protective case that keeps the weights clean and organized on the bench.
The case for owning a check weight set is strongest for precision rifle handloaders where 0.1-grain charge resolution matters – a 6.5 Creedmoor or 308 Winchester load node at 41.5 grains is not the same as 41.8 grains, and the only way to know which the scale is actually delivering is to verify it. The case is almost equally strong for any serious reloader who relies on a Hornady M2, Lyman Pro-Touch, or RCBS Rangemaster 2000 as their primary charge weight reference.
At $45-65, the set costs less than a box of premium bullets and provides years of reliable scale verification. That ratio of cost to consequence makes it one of the more straightforward accessory purchases in the precision loading toolkit.
Choose the RCBS Deluxe Scale Check Weight Set if you load precision rifle ammunition where charge weight accuracy matters, rely on any powder scale for charge weight verification, or want a bench-dedicated calibration reference in grain denominations – particularly if you run RCBS scales or other RCBS case prep equipment.
Choose the Hornady Scale Check Weight Set instead if you run Hornady scales like the Hornady M2 or Hornady Precision Lab Scale and prefer matched brand accessories – the verification function is identical.
Choose generic laboratory metric weights instead if you already own a certified metric weight set and are comfortable working with gram-to-grain conversions, or if you want to minimize cost without requiring grain-denomination convenience.
Skip the check weight set entirely only if you load exclusively on a progressive press with a volumetric powder measure and never rely on a scale for individual charge verification – in that workflow, the charging tool’s own consistency is the relevant variable, not the scale.
Disclaimer: Specifications and pricing in this article are drawn from manufacturer and retailer sources current at time of publication. Always verify current pricing before purchasing.
Editorial note: Originally published May 2026. Initial publication. The article covers the RCBS Deluxe Scale Check Weight Set’s traceable calibration standard, stainless steel construction, grain-denomination design for reloading applications, verification procedure for balance beam and digital powder scales, and competitive positioning against Hornady check weights, generic laboratory weights, and uncertified check weights.
