Load Specifications
Load data in caliber .32 Short Colt with .313 | 78gr | Rim Rock RN Cowboy bullet and 10 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: 3"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate Solo 1000*² | <<locked>> | 68% | 12,024 psi | 83% | 686 fps | 88.1% |
| ADI AS 30² | <<locked>> | 72% | 12,821 psi | 88% | 715 fps | 95.1% |
| Alliant RED DOT*² | <<locked>> | 76% | 12,473 psi | 86% | 725 fps | 94% |
| Hodgdon Clays² | <<locked>> | 72% | 12,850 psi | 89% | 686 fps | 98.9% |
| Maxam CSB 4*² | <<locked>> | 76% | 12,821 psi | 88% | 732 fps | 90% |
| Maxam CSB 5² | <<locked>> | 68% | 12,299 psi | 85% | 722 fps | 97.1% |
| ReloadSwiss RS 12* | <<locked>> | 80% | 11,850 psi | 82% | 781 fps | 90.1% |
| Rottweil P 801*² | <<locked>> | 72% | 12,633 psi | 87% | 778 fps | 94.4% |
| Vihtavuori N320*² | <<locked>> | 76% | 11,937 psi | 82% | 735 fps | 88.7% |
| Vihtavuori N32C Tin Star*ᴾ | <<locked>> | 100% | 8,659 psi | 60% | 646 fps | 92.6% |
Start Load - Barrel Length: 3"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate Solo 1000*² | <<locked>> | 60% | 10,617 psi | 73% | 650 fps | 85.7% |
| ADI AS 30*² | <<locked>> | 60% | 9,993 psi | 69% | 643 fps | 91.2% |
| Alliant RED DOT*² | <<locked>> | 60% | 8,456 psi | 58% | 607 fps | 87% |
| Hodgdon Clays² | <<locked>> | 60% | 9,834 psi | 68% | 614 fps | 96.2% |
| Maxam CSB 4*² | <<locked>> | 64% | 10,124 psi | 70% | 663 fps | 85.4% |
| Maxam CSB 5*² | <<locked>> | 60% | 9,398 psi | 65% | 643 fps | 93.2% |
| ReloadSwiss RS 12*² | <<locked>> | 72% | 9,587 psi | 66% | 712 fps | 85.4% |
| Rottweil P 801*² | <<locked>> | 60% | 8,992 psi | 62% | 676 fps | 88.3% |
| Vihtavuori N320*² | <<locked>> | 72% | 10,631 psi | 73% | 699 fps | 86.3% |
| Vihtavuori N32C Tin Star* | <<locked>> | 80% | 6,309 psi | 44% | 554 fps | 85.3% |
* 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 10 powders for .32 Short Colt loaded with the .313 | 78gr | Rim Rock RN Cowboy. ReloadSwiss RS 12 delivers the highest muzzle velocity at 781 fps; across all powders the maximum-charge window runs from 646 fps to 781 fps. Vihtavuori N32C Tin Star gives the best case fill at 100 %, and 2 of the 10 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (100 MPa), the top charges use 60–89 %, leaving at least 11 % headroom. Vihtavuori N32C Tin Star 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. As outliers, Accurate Solo 1000, Alliant RED DOT, Maxam CSB 4 burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, ADI AS 30, Alliant RED DOT 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.