Load Specifications
Load data in caliber .450 Bushmaster with .451 | 230gr | Rim Rock RN bullet and 7 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Lovex S053, Vihtavuori N110 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 |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 86% | 34,243 psi | 87% | 2218 fps | 97.2% |
| Hodgdon LilGun | <<locked>> | 82% | 33,953 psi | 87% | 2388 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,381 psi | 62% | 1493 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 35,346 psi | 90% | 2339 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,192 psi | 59% | 1526 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 34,998 psi | 89% | 2254 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 35,230 psi | 90% | 2320 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 80% | 28,442 psi | 73% | 2096 fps | 95.2% |
| Hodgdon LilGun | <<locked>> | 80% | 31,604 psi | 81% | 2346 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,216 psi | 44% | 1332 fps | 100% |
| Lovex S053 | 40.2 gr | 90% | 27,876 psi | 71% | 2182 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,476 psi | 42% | 1362 fps | 100% |
| SNPE Vectan BA6 1/2 | 32.7 gr | 80% | 19,841 psi | 51% | 1913 fps | 98.3% |
| Vihtavuori N110 | 34.1 gr | 80% | 24,178 psi | 62% | 2087 fps | 98.5% |
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 13 powders for .450 Bushmaster loaded with the .451 | 230gr | Rim Rock RN. Hodgdon LilGun delivers the highest muzzle velocity at 2,388 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,388 fps. ADI AR 2207 gives the best case fill at 100 %, and 13 of the 13 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 59–90 %, 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. Lovex S053, Vihtavuori N110, SNPE Vectan BA6 1/2 rank at the top here: for .450 Bushmaster with the .451 | 230gr | Rim Rock RN they combine a high case fill with complete burn and sit in the upper velocity band. 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.