Load Specifications
Load data in caliber .32 Rem. with .321 | 170gr | Winchester Silvertip bullet and 16 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: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 37,594 psi | 88% | 2100 fps | 98% |
| Accurate 2015 | <<locked>> | 98% | 37,840 psi | 88% | 2188 fps | 97.2% |
| ADI AR 2207 | <<locked>> | 86% | 36,869 psi | 86% | 2156 fps | 100% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 37,333 psi | 87% | 2241 fps | 99.1% |
| Alliant Reloder-10x | <<locked>> | 92% | 36,796 psi | 86% | 2182 fps | 98.1% |
| Alliant Reloder-7 | <<locked>> | 84% | 36,593 psi | 86% | 2116 fps | 98.4% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 38,696 psi | 90% | 2133 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,560 psi | 71% | 1368 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 37,362 psi | 87% | 2136 fps | 98.8% |
| Norma 200 | <<locked>> | 88% | 36,550 psi | 85% | 2165 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,168 psi | 71% | 1401 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 36,970 psi | 86% | 1949 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 37,855 psi | 88% | 2175 fps | 96.3% |
| Vihtavuori N120 | <<locked>> | 86% | 37,130 psi | 87% | 2126 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 37,768 psi | 88% | 2142 fps | 98% |
| Vihtavuori N133 | <<locked>> | 98% | 36,898 psi | 86% | 2129 fps | 96.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 35,085 psi | 82% | 2054 fps | 97.4% |
| Accurate 2015 | <<locked>> | 92% | 31,227 psi | 73% | 2060 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 30,589 psi | 71% | 2037 fps | 99.4% |
| Alliant AR-Comp | 27.1 gr | 88% | 26,063 psi | 61% | 1985 fps | 95.1% |
| Alliant Reloder-10x | 25.3 gr | 84% | 28,848 psi | 67% | 2018 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 32,460 psi | 76% | 2037 fps | 97.3% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 36,303 psi | 85% | 2090 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,568 psi | 53% | 1224 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 28,398 psi | 66% | 1949 fps | 96.2% |
| Norma 200 | 24.9 gr | 80% | 28,543 psi | 67% | 1998 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,423 psi | 52% | 1257 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 35,085 psi | 82% | 1923 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 35,636 psi | 83% | 2133 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 30,821 psi | 72% | 2014 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 29,805 psi | 70% | 1988 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 94% | 32,880 psi | 77% | 2054 fps | 95.2% |
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 16 powders for .32 Rem. loaded with the .321 | 170gr | Winchester Silvertip. Alliant AR-Comp delivers the highest muzzle velocity at 2,241 fps; across all powders the maximum-charge window runs from 1,368 fps to 2,241 fps. Alliant AR-Comp gives the best case fill at 100 %, and 16 of the 16 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (295 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.321" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. 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 Rem. with the .321 | 170gr | Winchester Silvertip 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.