Load Specifications
Load data in caliber .45 Auto Rim with .452 | 230gr | H&N SWC HS bullet and 15 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 |
|---|---|---|---|---|---|---|
| Accurate Solo 1250² | <<locked>> | 64% | 15,447 psi | 89% | 876 fps | 99.4% |
| Alliant Herco² | <<locked>> | 76% | 14,881 psi | 86% | 899 fps | 95.1% |
| Alliant UNIQUE² | <<locked>> | 64% | 15,069 psi | 87% | 902 fps | 95.1% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 76% | 14,605 psi | 84% | 856 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,472 psi | 60% | 728 fps | 100% |
| Maxam CSB 1² | <<locked>> | 64% | 14,750 psi | 85% | 856 fps | 99.2% |
| Maxam CSB 2² | <<locked>> | 64% | 14,127 psi | 81% | 879 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,007 psi | 52% | 715 fps | 98.8% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 15,432 psi | 89% | 928 fps | 97.6% |
| SNPE Vectan A0*² | <<locked>> | 64% | 15,156 psi | 87% | 863 fps | 94.8% |
| Vihtavuori 3N37*² | <<locked>> | 68% | 15,011 psi | 86% | 912 fps | 87.9% |
| Vihtavuori N32C Tin Star | <<locked>> | 84% | 14,330 psi | 82% | 804 fps | 100% |
| Vihtavuori N340² | <<locked>> | 64% | 15,621 psi | 90% | 896 fps | 95.9% |
| Vihtavuori N350*² | <<locked>> | 72% | 14,808 psi | 85% | 906 fps | 88.1% |
| Winchester AutoComp ² | <<locked>> | 64% | 14,924 psi | 86% | 876 fps | 98.6% |
Start Load - Barrel Length: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate Solo 1250² | <<locked>> | 60% | 13,924 psi | 80% | 843 fps | 98.7% |
| Alliant Herco*² | <<locked>> | 60% | 9,297 psi | 53% | 738 fps | 87.1% |
| Alliant UNIQUE*² | <<locked>> | 60% | 13,300 psi | 76% | 856 fps | 93.3% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 9,152 psi | 53% | 725 fps | 99.3% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,264 psi | 25% | 509 fps | 92.8% |
| Maxam CSB 1² | <<locked>> | 60% | 12,879 psi | 74% | 814 fps | 98.1% |
| Maxam CSB 2² | <<locked>> | 60% | 12,676 psi | 73% | 846 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 3,858 psi | 22% | 495 fps | 85.6% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 11,676 psi | 67% | 830 fps | 93.7% |
| SNPE Vectan A0*² | <<locked>> | 60% | 13,402 psi | 77% | 823 fps | 92.9% |
| Vihtavuori 3N37*² | <<locked>> | 64% | 13,431 psi | 77% | 873 fps | 85.8% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,397 psi | 43% | 646 fps | 100% |
| Vihtavuori N340*² | <<locked>> | 60% | 13,764 psi | 79% | 853 fps | 94.2% |
| Vihtavuori N350*² | <<locked>> | 68% | 13,227 psi | 76% | 866 fps | 85.9% |
| Winchester AutoComp ² | <<locked>> | 60% | 13,271 psi | 76% | 840 fps | 97.5% |
* 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 3 powders for .45 Auto Rim loaded with the .452 | 230gr | H&N SWC HS. Vihtavuori N32C Tin Star delivers the highest muzzle velocity at 804 fps; across all powders the maximum-charge window runs from 715 fps to 804 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 3 of the 3 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (120 MPa), the top charges use 52–82 %, leaving at least 18 % 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, Vihtavuori N32C Tin Star 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.