Load Specifications
Load data in caliber .45 Colt with .452 | 200gr | H&N RN KB bullet and 3 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: 5.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon TrailBoss | <<locked>> | 92% | 13,706 psi | 86% | 961 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,228 psi | 89% | 1010 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 64% | 13,416 psi | 84% | 942 fps | 100% |
Start Load - Barrel Length: 5.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,628 psi | 42% | 732 fps | 99.7% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 5,961 psi | 37% | 715 fps | 96% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,835 psi | 74% | 902 fps | 100% |
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 Colt loaded with the .452 | 200gr | H&N RN KB. ReloadSwiss RS 14 delivers the highest muzzle velocity at 1,010 fps; across all powders the maximum-charge window runs from 942 fps to 1,010 fps. ReloadSwiss RS 14 gives the best case fill at 100 %, and 2 of the 3 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (110 MPa), the top charges use 84–89 %, leaving at least 11 % headroom. 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.