Load Specifications
Load data in caliber .32 Win. Spec. with .321 | 170gr | Speer Hot-Cor bullet and 15 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-10x, Norma 200 and Alliant AR-Comp.
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 ≥ 80% and propellant combustion ≥ 95%. 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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 39,030 psi | 88% | 2113 fps | 98.1% |
| Accurate 2015 | <<locked>> | 98% | 39,668 psi | 90% | 2201 fps | 97.4% |
| ADI AR 2207 | <<locked>> | 86% | 38,885 psi | 88% | 2175 fps | 100% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 39,421 psi | 89% | 2267 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 92% | 38,493 psi | 87% | 2195 fps | 98.3% |
| Alliant Reloder-7 | <<locked>> | 84% | 38,029 psi | 86% | 2129 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,893 psi | 70% | 1378 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 39,175 psi | 89% | 2159 fps | 99% |
| Norma 200 | <<locked>> | 88% | 38,754 psi | 88% | 2188 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,908 psi | 70% | 1414 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 38,305 psi | 87% | 1962 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 39,755 psi | 90% | 2198 fps | 96.6% |
| Vihtavuori N120 | <<locked>> | 86% | 39,088 psi | 88% | 2146 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 39,653 psi | 90% | 2162 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 98% | 38,740 psi | 88% | 2152 fps | 96.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 36,593 psi | 83% | 2070 fps | 97.6% |
| Accurate 2015 | <<locked>> | 92% | 32,996 psi | 75% | 2080 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 32,300 psi | 73% | 2054 fps | 99.5% |
| Alliant AR-Comp | 28.6 gr | 88% | 27,224 psi | 62% | 2001 fps | 95.4% |
| Alliant Reloder-10x | 26 gr | 82% | 28,268 psi | 64% | 1988 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 80% | 33,649 psi | 76% | 2047 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,902 psi | 52% | 1230 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 29,225 psi | 66% | 1955 fps | 96.2% |
| Norma 200 | 26.3 gr | 80% | 30,037 psi | 68% | 2014 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,423 psi | 51% | 1257 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 36,492 psi | 82% | 1936 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 35,172 psi | 80% | 2113 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 32,532 psi | 74% | 2031 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 29,341 psi | 66% | 1962 fps | 95% |
| Vihtavuori N133 | <<locked>> | 94% | 34,403 psi | 78% | 2073 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 15 powders for .32 Win. Spec. loaded with the .321 | 170gr | Speer Hot-Cor. Alliant AR-Comp delivers the highest muzzle velocity at 2,267 fps; across all powders the maximum-charge window runs from 1,378 fps to 2,267 fps. Alliant AR-Comp gives the best case fill at 100 %, and 15 of the 15 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. Alliant AR-Comp, 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. Alliant Reloder-10x, Norma 200, Alliant AR-Comp rank at the top here: for .32 Win. Spec. with the .321 | 170gr | Speer Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.