Published: 2024 | Last updated: June 2026
Introduction
Swift Bullet Company introduced the Scirocco II in the early 2000s as an update to the original Scirocco, refining the bonded, polymer-tipped boat-tail design that put Swift on the map among serious long-range hunters. Swift was later acquired and is now part of the broader Vista Outdoor portfolio of ammunition and component brands, though the Scirocco II’s manufacturing and design have remained largely consistent through that ownership transition.
This is a meaningfully different category of bullet than most of the premium hunting bullets covered recently on this site. Where the Barnes TTSX, Hornady GMX, Nosler E-Tip, and Federal Trophy Copper are all lead-free monolithic designs, the Scirocco II uses a bonded lead core – a traditional jacketed bullet construction where the lead core is chemically or electrochemically fused to the copper jacket, rather than the core being eliminated entirely. This is the same general construction category as the Nosler AccuBond and Federal Trophy Bonded, and it carries different tradeoffs than monolithic construction: genuine bonding achieves slightly lower weight retention ceilings than a solid copper bullet (since there remains a bonded interface that can, under extreme conditions, still separate, however rarely), but bonded bullets are not subject to lead-free legal restrictions and are often somewhat less expensive to manufacture than full monolithic designs.
The original article’s claim of “95-100% weight retention” deserves the same calibration this series has consistently applied throughout, but with an important distinction specific to bonded construction. For monolithic bullets like the TTSX, this site has consistently noted that “near-100%” claims should be read as 95-99%. For a genuinely bonded lead-core bullet like the Scirocco II, the honest ceiling is somewhat different and generally lower – 90-95% is the more realistic range for well-performing bonded designs under typical hunting conditions, since the bonding process, however effective, still involves two distinct materials joined at an interface rather than a single homogeneous material throughout. A bonded bullet achieving 100% weight retention would be unusual even compared to a top-tier monolithic achieving the same figure.
The caliber range covers .243-inch through .338-inch, with weight options spanning a notably wide 90 to 300 grains – the upper end of that range extends well beyond what most of the lead-free monolithics in this comparison series offer, into genuinely heavy dangerous-game-adjacent territory for 338 Winchester Magnum and similar large-caliber magnum applications. Cartridges this bullet most commonly pairs with include 6.5 PRC, 7mm-08 Remington, 30-06 Springfield, and 338 Lapua Magnum. For trajectory context, the 308 Winchester ballistics guide and 6.5 Creedmoor ballistics guide provide useful reference data alongside the Scirocco II’s own specifications below.
Disclaimer: Reloading is an inherently dangerous activity. Always consult current published load data from reputable sources (Swift, Hodgdon, Sierra) before loading any cartridge. Start at the published minimum charge and work up carefully while watching for pressure signs. Never exceed maximum published loads. The information on this page is for educational reference only and does not replace a current reloading manual.
Technical Characteristics
Bonded lead core, progressive copper jacket: The Scirocco II’s core is metallurgically bonded to its jacket, a process that fuses the two materials at the molecular level rather than relying on the mechanical pressure-fit used in conventional cup-and-core construction. This bonding is the source of the bullet’s strong weight retention and resistance to core-jacket separation under the stress of impact and expansion – the bond holds the components together through deformation in a way a simple pressure-fit cannot reliably match, even though it falls short of the near-complete retention achievable with monolithic construction.
Progressive (tapered) jacket thickness: This is the Scirocco II’s signature engineering feature and the source of its name recognition among long-range hunters. The jacket is deliberately thinner toward the nose and progressively thicker toward the base. This tapering means the bullet expands relatively easily at the front, initiating reliably even at the lower end of its velocity range, while the thicker base jacket resists further expansion and helps the bullet retain structural integrity for continued penetration. This is a genuinely different engineering approach than a uniform-thickness jacket, and it is the mechanical reason the Scirocco II is marketed specifically around consistent performance across a wide velocity range – from close-range high-velocity impacts to long-range impacts where velocity has dropped substantially.
Polymer-tipped boat-tail: The black polymer tip fills and shapes the meplat for BC consistency and initiates expansion on impact by driving into the underlying cavity. The boat-tail base reduces drag, contributing to the bullet’s strong BC figures. The stated 1,800 fps expansion threshold matches the conventional industry benchmark, though the progressive jacket design is specifically intended to make that threshold a genuinely reliable floor rather than a marginal one.
Reduced fouling claim: The 15-20% fouling reduction figure mirrors claims made for several monolithic bullets in this series, here attributed specifically to “bonded construction” rather than lead-free composition. This framing deserves a closer look: bonded lead-core bullets still deposit lead in the bore exactly as conventional cup-and-core bullets do, since bonding does not remove the lead core, it only secures it more firmly to the jacket. Any fouling reduction attributable to the Scirocco II specifically would need to come from some other design factor – bore-friction characteristics of the jacket material or profile, for instance – rather than from the bonding process itself, which addresses core retention, not fouling. This claim should be treated with more skepticism than the equivalent claim made for genuinely lead-free monolithic bullets, where the absence of lead deposits provides a clear physical mechanism for at least some fouling reduction.
Long bearing surface, seating sensitivity: While bonded lead-core bullets are generally shorter than monolithic bullets of the same weight (since lead is denser than copper and the bullet doesn’t need as much length to reach a given mass), the original article’s seating depth guidance (0.010-0.050 inches off lands) remains sound general practice for any premium hunting bullet, bonded or monolithic, though the underlying sensitivity mechanism is somewhat different – here it relates more to consistent ogive engagement with the rifling than to an unusually long bearing surface.
Ballistics and Performance
G1 BCs from 0.300 to 0.600 are strong figures, and the original article’s claim that they are competitive with the Nosler AccuBond (0.350-0.588) while exceeding the Barnes TTSX (0.295-0.586) at some weights holds up reasonably well against the published figures, though the comparison varies by specific weight rather than being uniformly true across the entire range.
The 225-grain .338-inch at BC 0.600 and SD 0.281 is the lineup’s aerodynamic peak, intended for 338 Winchester Magnum and similar magnum cartridges for moose, large bear, and dangerous-game-adjacent applications. This is a genuinely strong figure, exceeding the TTSX 225-grain at BC 0.586 and competitive with the upper end of the AccuBond range.
The 180-grain .308-inch at BC 0.550 and SD 0.271 covers 308 Winchester, 30-06 Springfield, and 300 Winchester Magnum for elk and moose. This notably exceeds the TTSX 180-grain at BC 0.484 and the AccuBond 180-grain at a comparable weight – a genuine BC advantage for the Scirocco II at this specific weight, consistent with the original article’s claim of strong long-range performance.
The 130-grain 6.5mm at BC 0.520 and SD 0.266 covers 6.5 Creedmoor and 6.5 PRC for deer and elk – a strong figure that exceeds the TTSX 130-grain at BC 0.454 by a meaningful margin and represents one of the higher-BC bonded options available at this popular weight.
The 90-grain .243-inch at BC 0.420 and SD 0.218 is notably high for such a light bullet – higher than the TTSX 110-grain at BC 0.412 despite being 20 grains lighter, and substantially higher than most conventional 90-grain .243-inch options. This reflects the combination of the polymer tip and the bonded construction’s typically more streamlined profile compared to pure monolithic designs at very light weights, where monolithic bullets sometimes need a stubbier profile to achieve adequate structural integrity at low weight.
For genuine context on where these figures sit relative to the most aggressively long-range-optimized hunting bullet on the market, the Hornady ELD-X achieves BCs from 0.485 to 0.781 – meaningfully higher than the Scirocco II across comparable weights. This is a real and substantial gap, not a close competition, and reflects ELD-X’s Heat Shield polymer tip technology specifically engineered to prevent aerodynamic heating-related BC degradation at sustained high velocity and extended range, a more specialized and more recently developed feature than the Scirocco II’s progressive jacket design offers.
Accuracy of 0.4-0.7 MOA is a strong, tight specification, competitive with the better performers among the premium hunting bullets covered on this site.
Expert Ballistics Table – Swift Scirocco II Variants
Data from Swift specifications. BCs are G1. Verify current figures at swiftbullets.com before load development.
| Diameter (inches) | Weight (grains) | BC (G1) | Sectional Density | Application |
|---|---|---|---|---|
| .243 | 90 | 0.420 | 0.218 | Deer, antelope in 243 Winchester |
| .264 | 130 | 0.520 | 0.266 | Deer, elk in 6.5 Creedmoor and 6.5 PRC |
| .277 | 130 | 0.460 | 0.242 | Deer, elk in 270 Winchester |
| .284 | 150 | 0.490 | 0.266 | Elk in 7mm Remington Magnum |
| .308 | 165 | 0.520 | 0.248 | Deer, elk in 308 Winchester and 30-06 Springfield |
| .308 | 180 | 0.550 | 0.271 | Elk, moose in 30-06 Springfield and 300 Winchester Magnum |
| .338 | 210 | 0.570 | 0.263 | Elk, moose in 338 Winchester Magnum |
| .338 | 225 | 0.600 | 0.281 | Moose, large bear in 338 Winchester Magnum and 338 Lapua Magnum |
Comparison Bullets
The original article’s comparison set – Hornady ELD-X, Nosler AccuBond, and Barnes TTSX – spans two construction categories worth distinguishing clearly. The AccuBond is the most direct construction match, a bonded lead-core polymer-tipped design like the Scirocco II itself. The ELD-X is a non-bonded, heat-resistant tipped jacketed bullet representing a more specialized long-range engineering approach. The TTSX is lead-free monolithic, a fundamentally different material category from either bonded design.
The Hornady ELD-X holds a substantial and genuine BC advantage over the Scirocco II at nearly every comparable weight, owing to its Heat Shield tip technology and more aggressively streamlined profile. This is the most legitimate long-range BC leader among this comparison set, and hunters whose top priority is the flattest possible trajectory and least wind drift at extreme range should weight this comparison heavily. The Scirocco II’s progressive jacket design, however, offers a different value proposition – reliable expansion across a wide velocity range from a more traditional bonded construction with a longer overall market history.
The Nosler AccuBond is the closest direct construction competitor, also bonded lead-core with a polymer tip. BCs (0.350-0.588) are broadly comparable to the Scirocco II (0.300-0.600) across the overlapping weight range, with neither design holding a decisive universal advantage – the comparison varies by specific weight, similar to the pattern seen between the Trophy Copper and TTSX in the lead-free monolithic category.
The Barnes TTSX represents the lead-free monolithic alternative, with the original article’s claim that the Scirocco II “expands 5% more reliably than TTSX at low velocities” reflecting a genuine, if modest, advantage attributable to the progressive jacket’s design intent of reliable low-velocity expansion. This should be weighed against the TTSX’s near-complete (95-99%) weight retention versus the Scirocco II’s more realistic 90-95% bonded ceiling, and against the consideration of lead-free legal requirements in jurisdictions like California, where the Scirocco II’s lead content makes it ineligible regardless of its other performance characteristics.
The Federal Trophy Bonded is another genuinely bonded competitor worth considering, offering similar core-retention benefits within the same broad construction category as the Scirocco II and AccuBond. For hunters considering 300 PRC as an alternative magnum platform for the Scirocco II’s heavier weights, that cartridge’s growing popularity makes it worth factoring into the comparison alongside the more established 300 Winchester Magnum.
Comparison Table – Premium Long-Range Hunting Bullets
| Bullet | Diameter Range | Weight Range | BC Range | Construction | Weight Retention | Lead-Free |
|---|---|---|---|---|---|---|
| Swift Scirocco II | .243-.338 | 90-300 gr | 0.300-0.600 | Bonded lead-core | 90-95% | No |
| Hornady ELD-X | .224-.338 | 88-250 gr | 0.485-0.781 | Heat Shield tip, non-bonded | 80-90% | No |
| Nosler AccuBond | .224-.338 | 90-250 gr | 0.350-0.588 | Bonded lead-core | 90-95% | No |
| Federal Trophy Bonded | .243-.338 | 130-225 gr | 0.350-0.580 | Bonded lead-core | 90-95% | No |
| Barnes TTSX | .224-.338 | 50-225 gr | 0.295-0.586 | Solid copper monolithic | 95-99% | Yes |
Applications and Practical Aspects
Deer and antelope (.243-inch, 90 grains): The 90-grain Scirocco II in 243 Winchester is a notably high-BC option for this caliber and weight, well suited to deer and antelope hunting on open terrain where the elevated BC translates into a real trajectory advantage at extended range. Hodgdon Varget and IMR 4064 are standard powder choices for 243 Winchester at this weight.
Deer and elk (6.5mm and .277-inch, 130-150 grains): The 130-grain 6.5mm variant in 6.5 Creedmoor or 6.5 PRC, and the 130-grain .277-inch in 270 Winchester, are mainstream deer and elk loads with strong BC for their weight class. Hodgdon H4350 and Alliant Reloder 16 cover 6.5 Creedmoor; Hodgdon H4350 and IMR 4350 cover 270 Winchester.
Elk, moose, and large game (.284-.338-inch, 150-225 grains): The 150-grain .284-inch in 7mm Remington Magnum, the 165-180-grain .308-inch in 30-06 Springfield or 300 Winchester Magnum, and the 210-225-grain .338-inch in 338 Winchester Magnum or 338 Lapua Magnum are the Scirocco II’s strongest applications, where the progressive jacket’s reliable expansion across a wide velocity range is most valuable – close-range encounters with high-velocity magnum cartridges and long-range shots where velocity has bled off both benefit from the design’s intended consistency. Hodgdon H4831SC and Alliant Reloder 22 cover 300 Winchester Magnum and 300 WSM; Hodgdon H4831 and IMR 7828 cover 338 Winchester Magnum.
Heavy weights above 225 grains: The original article notes the lineup extends to 300 grains, beyond the 225-grain maximum reflected in its own ballistics table. Handloaders interested in the heaviest Scirocco II offerings should verify current weight and diameter availability directly with Swift, as this series has noted similar gaps between stated weight ranges and documented ballistics tables in other articles, and the heaviest dangerous-game-adjacent weights in any premium bullet lineup tend to see more limited production runs and availability than the mainstream hunting weights.
Reloading
Swift publishes Scirocco II-specific load data through its reloading resources, and the bonded construction’s pressure characteristics generally fall between conventional cup-and-core bullets and full monolithic designs – somewhat higher pressure than an unbonded lead-core bullet of the same weight, but typically lower than a comparable monolithic.
Primers: Standard large rifle primers for most applications. CCI 200, Federal 210, Winchester WLR, and Remington 9-1/2 are reliable choices. For magnum cartridges like 300 Winchester Magnum and 338 Winchester Magnum, CCI 250 or Federal 215 magnum primers are appropriate.
Cases: Standard brass from Winchester, Federal, Hornady, and Lapua are all appropriate. For magnum precision applications, Lapua brass provides the most consistent case-to-case dimensions.
Seating depth: Start 0.010 to 0.050 inches off the lands and test systematically. Bonded bullets generally show somewhat less extreme seating-depth sensitivity than monolithic designs, though consistent seating remains important for any premium hunting bullet’s accuracy potential.
Crimp: Light to medium roll crimp at the cannelure for semi-automatic and high-recoil rifles. Bolt-action hunting rifles typically do not require crimping.
Powder Selection by Application:
| Application | Caliber | Bullet Weight | Recommended Powders |
|---|---|---|---|
| Deer | 243 Win | 90 gr | Hodgdon Varget, IMR 4064, Hodgdon H4350 |
| Deer/elk | 6.5 Creedmoor | 130 gr | Hodgdon H4350, Alliant Reloder 16, Alliant Reloder 23 |
| Deer/elk | 270 Win | 130 gr | Hodgdon H4350, IMR 4350, Alliant Reloder 19 |
| Elk | 7mm Rem Mag | 150 gr | Alliant Reloder 22, Hodgdon H4831SC, IMR 7828 SSC |
| Deer/elk | 308 Win | 165-180 gr | Hodgdon Varget, IMR 4895, Alliant Reloder 15 |
| Elk/moose | 300 Win Mag | 180 gr | Hodgdon H4831SC, Alliant Reloder 22, Alliant Reloder 26 |
| Moose/large bear | 338 Win Mag | 210-225 gr | Hodgdon H4831, IMR 7828, Alliant Reloder 33, Hodgdon Retumbo |
Reloading Parameters Summary:
| Parameter | Guideline |
|---|---|
| Neck tension | 0.002-0.004 inch interference |
| Seating depth | 0.010-0.050 inch off lands |
| Crimp | Light to medium roll crimp for semi-auto/heavy recoil; optional for bolt-action |
| Minimum expansion velocity | 1,800 fps at target distance |
| Weight retention | 90-95% typical (not 95-100% as the original article stated) |
| Extreme spread target | Under 12 fps for hunting accuracy |
Frequently Asked Questions
Q: Is the Scirocco II’s claimed “95-100% weight retention” accurate for a bonded bullet?
A: This overstates what bonded construction typically achieves. While monolithic bullets like the Barnes TTSX can realistically approach 95-99% retention since there is no separate core to lose, bonded lead-core bullets like the Scirocco II have a somewhat lower realistic ceiling, generally 90-95% under typical hunting conditions. The bonding process significantly improves core retention compared to conventional unbonded cup-and-core construction (which typically achieves 65-85%), but it does not eliminate the fundamental two-material interface the way monolithic construction does. Treat “95-100%” as optimistic marketing language rather than a literal description of expected field performance.
Q: Does bonded construction actually reduce fouling, as the original article claims?
A: This claim deserves more skepticism than similar fouling claims made for lead-free monolithic bullets. Bonding addresses core-to-jacket adhesion, not the lead content of the bullet – a bonded lead-core bullet still deposits lead in the bore just as a conventional unbonded lead-core bullet does, since the lead core remains present either way. Any fouling difference between a bonded bullet and a non-bonded lead-core bullet of similar jacket profile would need to come from some other factor entirely, not from the bonding process itself. This is a case where the original article’s marketing language conflates two unrelated bullet characteristics – bonding and fouling – that don’t have a direct causal relationship.
Q: How does the Scirocco II’s BC really compare to the Hornady ELD-X – is the original article’s claim accurate?
A: The original article notes the Scirocco II “trails ELD-X by 5-10% in trajectory flatness,” but checking the published BC figures suggests this actually understates the gap at many weights. The ELD-X’s BC range (0.485-0.781) is substantially higher than the Scirocco II’s (0.300-0.600) across most comparable weights, often by considerably more than 5-10%. This reflects the ELD-X’s more specialized and more recently developed Heat Shield tip technology, engineered specifically to address aerodynamic heating effects at sustained high velocity that can degrade a conventional polymer tip’s BC consistency at extreme range. Hunters whose top priority is the absolute flattest trajectory at very long range should weight the ELD-X comparison more heavily than the original article’s framing suggests.
Q: What does the “progressive jacket” actually do differently than a standard uniform jacket?
A: The tapered thickness – thinner at the nose, thicker toward the base – means the bullet’s expansion behavior changes as it travels through tissue rather than being uniform throughout. At the nose, the thin jacket allows expansion to initiate easily and reliably even at relatively low impact velocity, addressing the common problem of premium bullets failing to expand reliably on longer shots where velocity has dropped. As the expanding mushroom progresses rearward into the thicker base jacket, resistance to further deformation increases, which helps the bullet retain a coherent shape and continue penetrating rather than flattening out completely or fragmenting. This is a genuinely different engineering approach from a uniform-thickness jacket, which must compromise between easy low-velocity initiation and high-velocity structural integrity rather than optimizing for both simultaneously at different points along the bullet’s length.
Q: Is the Scirocco II legal to use in California or other lead-restricted areas?
A: No – the Scirocco II uses a bonded lead core, which means it contains lead and does not meet lead-free ammunition requirements in California and similar jurisdictions for the hunting applications those restrictions cover. Hunters in lead-restricted areas who want comparable long-range performance and reliable expansion across a wide velocity range should look at lead-free monolithics like the Barnes TTSX or Federal Trophy Copper, both of which offer competitive BCs without the lead content.
Q: For an elk hunt where I might take a shot anywhere from 50 to 400 yards, is the Scirocco II’s wide-velocity-range design a meaningful practical advantage?
A: Yes, this is genuinely the scenario the progressive jacket design is built to address, and it represents a real, distinguishing use case rather than generic marketing language. A close-range shot at high impact velocity and a 400-yard shot at substantially reduced velocity place very different demands on a bullet’s expansion mechanism – a jacket optimized purely for one scenario can underperform at the other. The Scirocco II’s tapered jacket thickness is specifically engineered to perform reliably across that full range rather than being optimized narrowly for either close-range or long-range impact alone, which is a legitimate and useful characteristic for hunters who cannot predict in advance what shot distance a specific hunt will present.
Conclusion
The Swift Scirocco II is a well-established bonded premium hunting bullet with genuinely strong ballistic coefficients – competitive with or exceeding the Barnes TTSX at several weights, and broadly comparable to the Nosler AccuBond – though it trails the more specialized Hornady ELD-X by a more substantial margin than the original article’s framing suggested. Its progressive jacket design offers a genuine engineering advantage for hunters facing unpredictable shot distances, and its weight retention, while strong for bonded construction, should be understood as 90-95% rather than the stated 95-100%.
Choose the Scirocco II if: you want a bonded bullet with genuinely competitive long-range BCs; your hunting involves unpredictable shot distances where reliable expansion across both close and long range matters; or you want a longer-established bonded design with an extensive market history.
Choose something else if: absolute maximum BC at extreme range is your top priority – the Hornady ELD-X holds a substantial advantage there. If you hunt in lead-restricted areas including California, the Scirocco II’s lead content makes it ineligible – choose the Barnes TTSX or Federal Trophy Copper instead. If you want the highest possible weight retention regardless of construction category, a top-tier monolithic bullet’s 95-99% ceiling exceeds what even the best bonded designs typically achieve. For dangerous-game-adjacent hunting in 7mm PRC or similar modern magnums, the Nosler Partition or Winchester Expedition Big Game are additional bonded alternatives worth comparing, and budget-conscious hunters might also consider conventional jacketed options like the Sierra GameKing.
Disclaimer: Reloading involves inherent risks. Always use current load data from Swift or other published manuals. Start below maximum charges and increase gradually. The Scirocco II contains lead and is not legal for hunting in lead-restricted jurisdictions. Wear eye protection at all times. The author and myreloading.com are not responsible for injuries or property damage from reloading or shooting handloaded ammunition.
Have you loaded and hunted with the Swift Scirocco II? Leave a comment with the details: weight, cartridge, game, range, shot angle, and what you observed. How did it compare to a Hornady ELD-X, Nosler AccuBond, or Barnes TTSX you may have used in the same cartridge? Recovered bullet weights and photos are always valuable to other hunters evaluating their premium bullet options.
Editorial note: Originally published 2024, revised June 2026. The update corrected the original article’s claim of “95-100% weight retention” to the more realistic 90-95% appropriate for genuinely bonded lead-core construction, distinguishing this ceiling from the higher 95-99% figure achievable by monolithic bullets elsewhere in this series. Applied scrutiny to the “reduced fouling from bonded construction” claim, clarifying that bonding addresses core retention rather than lead deposition, and that the two are not causally related. Corrected the original article’s understated framing of the BC gap against the Hornady ELD-X, which is substantially larger than the stated 5-10% at most comparable weights. Added detailed explanation of the progressive jacket’s engineering mechanism and its genuine practical value for hunters facing unpredictable shot distances. Flagged the discrepancy between the original article’s stated 300-grain maximum weight and its own ballistics table topping out at 225 grains. Added FAQ covering six common questions. Applied full internal linking throughout.
