Load Specifications
Load data in caliber .45 Auto Rim with .451 | 260gr | Speer JHP bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon TrailBoss and ReloadSwiss RS 14.
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 ≥ 60% and propellant combustion ≥ 80%. 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: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Alliant Herco² | <<locked>> | 68% | 14,692 psi | 84% | 814 fps | 96.3% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 72% | 15,708 psi | 90% | 797 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,010 psi | 75% | 709 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,748 psi | 68% | 705 fps | 100% |
| Rottweil P 806*² | <<locked>> | 76% | 15,374 psi | 88% | 932 fps | 89% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 64% | 14,315 psi | 82% | 797 fps | 87.5% |
| Vihtavuori N32C Tin Star² | <<locked>> | 76% | 14,924 psi | 86% | 732 fps | 100% |
| Vihtavuori N350*² | <<locked>> | 68% | 15,650 psi | 90% | 850 fps | 91.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Alliant Herco*² | <<locked>> | 60% | 11,748 psi | 68% | 741 fps | 93.2% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,153 psi | 64% | 705 fps | 100% |
| Hodgdon TrailBoss² | 3.1 gr | 60% | 6,222 psi | 36% | 525 fps | 98.9% |
| ReloadSwiss RS 14*² | 3.1 gr | 60% | 5,714 psi | 33% | 512 fps | 94.6% |
| Rottweil P 806*² | <<locked>> | 72% | 13,445 psi | 77% | 886 fps | 86.4% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 12,865 psi | 74% | 761 fps | 85.4% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,732 psi | 56% | 630 fps | 100% |
| Vihtavuori N350*² | <<locked>> | 60% | 12,140 psi | 70% | 764 fps | 86.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 2 powders for .45 Auto Rim loaded with the .451 | 260gr | Speer JHP. Hodgdon TrailBoss delivers the highest muzzle velocity at 709 fps; across all powders the maximum-charge window runs from 705 fps to 709 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 2 of the 2 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (120 MPa), the top charges use 68–75 %, leaving at least 25 % headroom. 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. Hodgdon TrailBoss, ReloadSwiss RS 14 rank at the top here: for .45 Auto Rim with the .451 | 260gr | Speer JHP they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.