Load Specifications
Load data in caliber .450 Bushmaster with .452 | 225gr | Sierra JHC Sports Master bullet and 7 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 86% | 35,041 psi | 89% | 2228 fps | 96.8% |
| Hodgdon LilGun | <<locked>> | 82% | 35,172 psi | 90% | 2408 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,396 psi | 65% | 1506 fps | 100% |
| Lovex S053 | <<locked>> | 96% | 34,185 psi | 87% | 2310 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,453 psi | 62% | 1539 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 98% | 33,953 psi | 87% | 2234 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 34,229 psi | 87% | 2297 fps | 99.9% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 82% | 31,241 psi | 80% | 2152 fps | 95.6% |
| Hodgdon LilGun | <<locked>> | 80% | 32,721 psi | 84% | 2362 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,405 psi | 47% | 1345 fps | 100% |
| Lovex S053 | <<locked>> | 92% | 30,618 psi | 78% | 2234 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,666 psi | 45% | 1371 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 21,074 psi | 54% | 1936 fps | 98.3% |
| Vihtavuori N110 | <<locked>> | 80% | 25,585 psi | 65% | 2110 fps | 98.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 12 powders for .450 Bushmaster loaded with the .452 | 225gr | Sierra JHC Sports Master. Hodgdon LilGun delivers the highest muzzle velocity at 2,408 fps; across all powders the maximum-charge window runs from 1,506 fps to 2,408 fps. ADI AR 2207 gives the best case fill at 100 %, and 12 of the 12 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. ADI AR 2207, Hodgdon TrailBoss, ReloadSwiss RS 14 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. As outliers, Accurate No. 11 FS, ADI AR 2207, IMR 4227 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.