Load Specifications
Load data in caliber 8 x 51 mm Mauser with .321 | 170gr | Winchester Silvertip bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Hodgdon BL-C2 and Lovex D073.6.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 92% | 43,656 psi | 89% | 2428 fps | 99.9% |
| Accurate 2460 | <<locked>> | 88% | 41,814 psi | 85% | 2421 fps | 98.1% |
| Accurate 2495ᴾ | <<locked>> | 100% | 43,947 psi | 89% | 2500 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 41,814 psi | 85% | 2461 fps | 97.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 40,828 psi | 83% | 2474 fps | 98.6% |
| Accurate LT-30 | <<locked>> | 84% | 43,729 psi | 89% | 2352 fps | 99.3% |
| Accurate LT-32 | <<locked>> | 84% | 44,121 psi | 89% | 2359 fps | 98% |
| ADI AR 2207 | <<locked>> | 82% | 43,874 psi | 89% | 2395 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 44,251 psi | 90% | 2480 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 92% | 42,989 psi | 87% | 2438 fps | 96.1% |
| Alliant AR-Comp | <<locked>> | 94% | 42,815 psi | 87% | 2493 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 44,237 psi | 90% | 2448 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 42,076 psi | 85% | 2346 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 90% | 43,308 psi | 88% | 2398 fps | 96.8% |
| Hodgdon BL-C2 | <<locked>> | 94% | 42,496 psi | 86% | 2490 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 88% | 43,221 psi | 88% | 2464 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 88% | 43,787 psi | 89% | 2480 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 43,932 psi | 89% | 2530 fps | 95.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,735 psi | 66% | 1519 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 43,555 psi | 88% | 2530 fps | 99.7% |
| IMR 4198 | <<locked>> | 86% | 43,366 psi | 88% | 2388 fps | 100% |
| IMR 8208 XBR | <<locked>> | 92% | 42,989 psi | 87% | 2438 fps | 96.1% |
| Lovex D073.4 | <<locked>> | 82% | 42,032 psi | 85% | 2428 fps | 97.5% |
| Lovex D073.5 | <<locked>> | 90% | 44,570 psi | 90% | 2470 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 96% | 42,511 psi | 86% | 2487 fps | 97.9% |
| Lovex S062 | <<locked>> | 98% | 41,771 psi | 85% | 2438 fps | 95.9% |
| Norma 200 | <<locked>> | 84% | 44,512 psi | 90% | 2431 fps | 100% |
| Norma 201 | <<locked>> | 96% | 44,599 psi | 90% | 2470 fps | 96.6% |
| Norma 202 | <<locked>> | 96% | 44,353 psi | 90% | 2490 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,808 psi | 67% | 1555 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 42,815 psi | 87% | 2438 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 92% | 43,018 psi | 87% | 2428 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 96% | 42,032 psi | 85% | 2415 fps | 95.9% |
| Shooters World AR Plus | <<locked>> | 82% | 42,032 psi | 85% | 2428 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 96% | 42,511 psi | 86% | 2487 fps | 97.9% |
| Shooters World Precision | <<locked>> | 98% | 41,771 psi | 85% | 2438 fps | 95.9% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 41,930 psi | 85% | 2438 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 42,380 psi | 86% | 2411 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 42,221 psi | 86% | 2362 fps | 98.2% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 43,163 psi | 88% | 2395 fps | 99.2% |
| Somchem S321 | <<locked>> | 90% | 43,134 psi | 87% | 2467 fps | 96.5% |
| Somchem S335 | <<locked>> | 94% | 43,308 psi | 88% | 2405 fps | 99.1% |
| Vihtavuori N120 | <<locked>> | 82% | 44,019 psi | 89% | 2352 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 42,308 psi | 86% | 2365 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 44,353 psi | 90% | 2411 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 98% | 42,061 psi | 85% | 2457 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 98% | 44,498 psi | 90% | 2467 fps | 99% |
| Vihtavuori N530 | <<locked>> | 92% | 43,033 psi | 87% | 2434 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 98% | 42,844 psi | 87% | 2457 fps | 98.3% |
| Winchester 748 | <<locked>> | 94% | 43,845 psi | 89% | 2513 fps | 97.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 30,037 psi | 61% | 2165 fps | 97.8% |
| Accurate 2460 | <<locked>> | 80% | 31,981 psi | 65% | 2228 fps | 95.3% |
| Accurate 2495 | <<locked>> | 80% | 22,553 psi | 46% | 2044 fps | 95.1% |
| Accurate 2520 | <<locked>> | 86% | 34,069 psi | 69% | 2316 fps | 95.6% |
| Accurate 4064 | <<locked>> | 90% | 29,631 psi | 60% | 2244 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 38,754 psi | 79% | 2264 fps | 98.6% |
| Accurate LT-32 | <<locked>> | 80% | 39,088 psi | 79% | 2270 fps | 96.9% |
| ADI AR 2207 | <<locked>> | 80% | 41,205 psi | 84% | 2352 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 36,434 psi | 74% | 2339 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 90% | 40,205 psi | 82% | 2388 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 27,586 psi | 56% | 2182 fps | 99.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,737 psi | 70% | 2277 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 37,043 psi | 75% | 2257 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 38,247 psi | 78% | 2306 fps | 95.4% |
| Hodgdon BL-C2 | 39.9 gr | 90% | 37,376 psi | 76% | 2395 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 33,214 psi | 67% | 2270 fps | 97.1% |
| Hodgdon H335 | <<locked>> | 80% | 33,388 psi | 68% | 2277 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 41,162 psi | 83% | 2477 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,178 psi | 49% | 1355 fps | 100% |
| IMR 3031 | 32.1 gr | 80% | 26,295 psi | 53% | 2149 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 36,216 psi | 73% | 2264 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 40,205 psi | 82% | 2388 fps | 95.3% |
| Lovex D073.4 | <<locked>> | 80% | 39,465 psi | 80% | 2382 fps | 96.9% |
| Lovex D073.5 | <<locked>> | 84% | 36,506 psi | 74% | 2323 fps | 95.4% |
| Lovex D073.6 | 37.7 gr | 88% | 32,460 psi | 66% | 2293 fps | 95% |
| Lovex S062 | <<locked>> | 96% | 39,276 psi | 80% | 2392 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 39,073 psi | 79% | 2343 fps | 100% |
| Norma 201 | <<locked>> | 92% | 39,189 psi | 79% | 2372 fps | 95.1% |
| Norma 202 | <<locked>> | 84% | 30,429 psi | 62% | 2215 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,091 psi | 49% | 1388 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 35,418 psi | 72% | 2297 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 82% | 32,213 psi | 65% | 2211 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 94% | 39,552 psi | 80% | 2372 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 39,465 psi | 80% | 2382 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 32,460 psi | 66% | 2293 fps | 95% |
| Shooters World Precision | <<locked>> | 96% | 39,276 psi | 80% | 2392 fps | 95.2% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,608 psi | 74% | 2336 fps | 97% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,317 psi | 72% | 2280 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 30,922 psi | 63% | 2139 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 28,268 psi | 57% | 2096 fps | 95.1% |
| Somchem S321 | <<locked>> | 88% | 40,321 psi | 82% | 2415 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 28,369 psi | 58% | 2100 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 41,336 psi | 84% | 2313 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 33,373 psi | 68% | 2198 fps | 99.2% |
| Vihtavuori N133 | <<locked>> | 80% | 28,993 psi | 59% | 2116 fps | 97.2% |
| Vihtavuori N135 | <<locked>> | 80% | 24,207 psi | 49% | 2064 fps | 95.5% |
| Vihtavuori N140 | <<locked>> | 86% | 30,719 psi | 62% | 2201 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 90% | 40,147 psi | 81% | 2385 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 88% | 31,314 psi | 64% | 2228 fps | 95% |
| Winchester 748 | <<locked>> | 88% | 36,143 psi | 73% | 2362 fps | 95% |
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 50 powders for 8 x 51 mm Mauser loaded with the .321 | 170gr | Winchester Silvertip. Hodgdon LEVERevolution delivers the highest muzzle velocity at 2,530 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,530 fps. Accurate 2495 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 66–90 %, 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. Accurate 2495, Accurate 4064, Hodgdon TrailBoss 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. IMR 3031, Hodgdon BL-C2, Lovex D073.6 rank at the top here: for 8 x 51 mm Mauser 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.