Load Specifications
Load data in caliber .32 Short Colt with .313 | 75gr | Rim Rock FP 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 |
|---|---|---|---|---|---|---|
| ADI AS 30*² | <<locked>> | 72% | 12,444 psi | 86% | 725 fps | 94.1% |
| Alliant Green Dot*² | <<locked>> | 76% | 12,995 psi | 90% | 745 fps | 87.9% |
| Alliant RED DOT*² | <<locked>> | 76% | 12,082 psi | 83% | 732 fps | 92.9% |
| Hodgdon Clays² | <<locked>> | 72% | 12,531 psi | 86% | 696 fps | 98.4% |
| Maxam CSB 4*² | <<locked>> | 76% | 12,430 psi | 86% | 738 fps | 88.6% |
| Maxam CSB 5² | <<locked>> | 68% | 11,908 psi | 82% | 728 fps | 96.2% |
| ReloadSwiss RS 12* | <<locked>> | 84% | 12,604 psi | 87% | 820 fps | 90.4% |
| Rottweil P 801*² | <<locked>> | 72% | 12,096 psi | 83% | 784 fps | 93% |
| Vihtavuori N320* | <<locked>> | 80% | 12,995 psi | 90% | 778 fps | 89.5% |
| Vihtavuori N32C Tin Star*ᴾ | <<locked>> | 100% | 8,369 psi | 58% | 650 fps | 91% |
Start Load - Barrel Length: 3"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AS 30*² | <<locked>> | 60% | 9,703 psi | 67% | 650 fps | 89.9% |
| Alliant Green Dot*² | <<locked>> | 72% | 11,618 psi | 80% | 709 fps | 85.8% |
| Alliant RED DOT*² | <<locked>> | 60% | 8,209 psi | 57% | 614 fps | 85.6% |
| Hodgdon Clays² | <<locked>> | 60% | 9,602 psi | 66% | 620 fps | 95.3% |
| Maxam CSB 4*² | <<locked>> | 68% | 11,081 psi | 76% | 702 fps | 86.4% |
| Maxam CSB 5*² | <<locked>> | 60% | 9,137 psi | 63% | 650 fps | 92% |
| ReloadSwiss RS 12*² | <<locked>> | 76% | 10,225 psi | 71% | 748 fps | 85.9% |
| Rottweil P 801*² | <<locked>> | 60% | 8,630 psi | 60% | 679 fps | 86.6% |
| Vihtavuori N320*² | <<locked>> | 76% | 11,545 psi | 80% | 738 fps | 87.1% |
| Vihtavuori N32C Tin Star* | <<locked>> | 84% | 6,788 psi | 47% | 587 fps | 86.2% |
* 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 | 75gr | Rim Rock FP. ReloadSwiss RS 12 delivers the highest muzzle velocity at 820 fps; across all powders the maximum-charge window runs from 650 fps to 820 fps. Vihtavuori N32C Tin Star gives the best case fill at 100 %, and 3 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 58–90 %, leaving at least 10 % 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, ADI AS 30, Alliant Green Dot, Alliant RED DOT burn incompletely and react more sensitively to barrel length and temperature. ADI AS 30, Alliant Green Dot, 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.