Load Specifications
Load data in caliber .450 Bushmaster with .4515 | 240gr | Sierra Sports Master bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N110, Lovex S053 and SNPE Vectan BA6 1/2.
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 |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 84% | 34,766 psi | 89% | 2264 fps | 96.1% |
| ADI AR 2205 | <<locked>> | 84% | 33,489 psi | 86% | 2165 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,772 psi | 63% | 1470 fps | 100% |
| Lovex S053 | <<locked>> | 96% | 34,998 psi | 89% | 2290 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,612 psi | 60% | 1499 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 98% | 34,592 psi | 88% | 2201 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 34,867 psi | 89% | 2267 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 31,589 psi | 81% | 2264 fps | 96.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 82% | 32,561 psi | 83% | 2221 fps | 95.3% |
| ADI AR 2205 | <<locked>> | 80% | 29,515 psi | 75% | 2087 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,564 psi | 45% | 1309 fps | 100% |
| Lovex S053 | 39.6 gr | 88% | 27,456 psi | 70% | 2133 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,853 psi | 43% | 1339 fps | 100% |
| SNPE Vectan BA6 1/2 | 32.9 gr | 80% | 20,595 psi | 53% | 1900 fps | 99% |
| Vihtavuori N110 | 34.4 gr | 80% | 25,440 psi | 65% | 2073 fps | 99.2% |
| Vihtavuori N120 | <<locked>> | 98% | 29,820 psi | 76% | 2224 fps | 95.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 16 powders for .450 Bushmaster loaded with the .4515 | 240gr | Sierra Sports Master. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,316 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,316 fps. ADI AR 2207 gives the best case fill at 100 %, and 16 of the 16 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 60–90 %, 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. Vihtavuori N110, Lovex S053, SNPE Vectan BA6 1/2 rank at the top here: for .450 Bushmaster with the .4515 | 240gr | Sierra Sports Master they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2207, IMR 4227, Lovex D060 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.