Load Specifications
Load data in caliber .45 Auto Rim with .452 | 200gr | H&N KS HS 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 ≥ 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 Herco*² | <<locked>> | 72% | 14,997 psi | 86% | 1017 fps | 94.9% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 72% | 14,779 psi | 85% | 971 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 11,995 psi | 69% | 866 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 10,327 psi | 59% | 846 fps | 99.5% |
| ReloadSwiss RS 20² | <<locked>> | 64% | 15,098 psi | 87% | 1037 fps | 97.1% |
| Vihtavuori 3N37*² | <<locked>> | 64% | 15,142 psi | 87% | 1033 fps | 87.8% |
| Vihtavuori N32C Tin Star | <<locked>> | 80% | 14,750 psi | 85% | 919 fps | 100% |
Start Load - Barrel Length: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Alliant Herco*² | <<locked>> | 60% | 10,631 psi | 61% | 883 fps | 89.1% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,298 psi | 59% | 853 fps | 99.7% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,844 psi | 28% | 604 fps | 94.3% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 4,351 psi | 25% | 584 fps | 87.1% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 13,358 psi | 77% | 988 fps | 95.5% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 13,285 psi | 76% | 981 fps | 85.2% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 8,673 psi | 50% | 768 fps | 100% |
* 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 .452 | 200gr | H&N KS HS. Hodgdon TrailBoss delivers the highest muzzle velocity at 866 fps; across all powders the maximum-charge window runs from 846 fps to 866 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 59–69 %, leaving at least 31 % 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 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.