Load Specifications
Load data in caliber .32 Rem. with .321 | 170gr | Hornady InterLock FP bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, Accurate 2015 and Alliant Reloder-10x.
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% | 38,638 psi | 90% | 2136 fps | 98.5% |
| Accurate 2015 | <<locked>> | 96% | 37,043 psi | 87% | 2188 fps | 97.3% |
| Accurate LT-30 | <<locked>> | 86% | 37,463 psi | 88% | 2100 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 86% | 38,363 psi | 90% | 2195 fps | 100% |
| Alliant AR-Comp | <<locked>> | 98% | 36,680 psi | 86% | 2251 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 92% | 38,087 psi | 89% | 2221 fps | 98.6% |
| Alliant Reloder-7 | <<locked>> | 84% | 37,884 psi | 89% | 2156 fps | 98.8% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 37,753 psi | 88% | 2136 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,169 psi | 73% | 1394 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 37,086 psi | 87% | 2260 fps | 96.1% |
| IMR 4198 | <<locked>> | 90% | 38,682 psi | 90% | 2178 fps | 99.2% |
| Norma 200 | <<locked>> | 88% | 38,290 psi | 89% | 2211 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,806 psi | 72% | 1424 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 38,290 psi | 89% | 1985 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 37,188 psi | 87% | 2185 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 86% | 38,609 psi | 90% | 2165 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 37,057 psi | 87% | 2149 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 98% | 38,464 psi | 90% | 2178 fps | 97.4% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 33,199 psi | 78% | 2159 fps | 96.2% |
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% | 36,201 psi | 85% | 2093 fps | 98% |
| Accurate 2015 | 28.5 gr | 90% | 30,763 psi | 72% | 2067 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 84% | 35,433 psi | 83% | 2064 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 32,010 psi | 75% | 2080 fps | 99.7% |
| Alliant AR-Comp | 27.5 gr | 86% | 25,469 psi | 60% | 1985 fps | 95.2% |
| Alliant Reloder-10x | 25.6 gr | 82% | 28,065 psi | 66% | 2014 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 33,489 psi | 78% | 2073 fps | 97.9% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 35,201 psi | 82% | 2087 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,669 psi | 53% | 1237 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 35,041 psi | 82% | 2218 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 29,283 psi | 68% | 1988 fps | 96.9% |
| Norma 200 | <<locked>> | 80% | 29,820 psi | 70% | 2044 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,524 psi | 53% | 1270 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 36,071 psi | 84% | 1952 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 35,070 psi | 82% | 2142 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 80% | 32,256 psi | 75% | 2054 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 29,182 psi | 68% | 1991 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 92% | 32,227 psi | 75% | 2060 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 98% | 31,372 psi | 73% | 2119 fps | 95.5% |
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 19 powders for .32 Rem. loaded with the .321 | 170gr | Hornady InterLock FP. IMR 3031 delivers the highest muzzle velocity at 2,260 fps; across all powders the maximum-charge window runs from 1,394 fps to 2,260 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 19 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (295 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, IMR 3031, 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 AR-Comp, Accurate 2015, Alliant Reloder-10x rank at the top here: for .32 Rem. with the .321 | 170gr | Hornady InterLock FP 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.