Load Specifications
Load data in caliber 8 x 57 I with .321 | 180gr | Frontier PH HPFB bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and ReloadSwiss RS 60.
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>> | 88% | 49,240 psi | 89% | 2520 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 47,659 psi | 86% | 2536 fps | 99.9% |
| Accurate 2495 | <<locked>> | 94% | 49,081 psi | 89% | 2572 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 48,602 psi | 88% | 2585 fps | 99.9% |
| Accurate 4064 | <<locked>> | 96% | 48,907 psi | 89% | 2605 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 48,399 psi | 88% | 2585 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 96% | 49,255 psi | 89% | 2579 fps | 97.7% |
| ADI AR 2219 | <<locked>> | 82% | 49,574 psi | 90% | 2579 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 47,964 psi | 87% | 2552 fps | 99% |
| Alliant AR-Comp | <<locked>> | 88% | 46,586 psi | 85% | 2546 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 48,950 psi | 89% | 2641 fps | 98.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 47,239 psi | 86% | 2661 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 47,906 psi | 87% | 2598 fps | 98.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 49,647 psi | 90% | 2533 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 48,892 psi | 89% | 2615 fps | 97.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,240 psi | 88% | 2687 fps | 98.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 48,747 psi | 88% | 2470 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 47,471 psi | 86% | 2589 fps | 97% |
| Bofors RP3 | <<locked>> | 96% | 47,674 psi | 87% | 2605 fps | 98.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 47,355 psi | 86% | 2500 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 90% | 49,008 psi | 89% | 2618 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 86% | 47,413 psi | 86% | 2648 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 84% | 48,283 psi | 88% | 2559 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 49,269 psi | 89% | 2582 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 49,748 psi | 90% | 2615 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 90% | 48,718 psi | 88% | 2598 fps | 98.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,334 psi | 70% | 2438 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 46,905 psi | 85% | 2618 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,272 psi | 62% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 46,949 psi | 85% | 2552 fps | 98.4% |
| IMR 3031 | <<locked>> | 90% | 47,558 psi | 86% | 2598 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 48,704 psi | 88% | 2566 fps | 97.8% |
| IMR 4198 | <<locked>> | 82% | 47,500 psi | 86% | 2457 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 47,050 psi | 85% | 2598 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 88% | 47,964 psi | 87% | 2552 fps | 99% |
| Lovex D073.5 | <<locked>> | 84% | 47,282 psi | 86% | 2536 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 90% | 46,760 psi | 85% | 2569 fps | 99.8% |
| Lovex S060 | <<locked>> | 90% | 49,313 psi | 89% | 2530 fps | 98.3% |
| Lovex S062 | <<locked>> | 94% | 47,935 psi | 87% | 2566 fps | 99.1% |
| Norma 201 | <<locked>> | 90% | 47,239 psi | 86% | 2539 fps | 99% |
| Norma 202 | <<locked>> | 90% | 47,253 psi | 86% | 2552 fps | 100% |
| Norma 203B | <<locked>> | 94% | 48,051 psi | 87% | 2605 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 94% | 48,109 psi | 87% | 2621 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 88% | 47,021 psi | 85% | 2572 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 49,139 psi | 89% | 2552 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,418 psi | 62% | 1614 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 47,659 psi | 86% | 2543 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 48,022 psi | 87% | 2667 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 48,153 psi | 87% | 2700 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 88% | 48,689 psi | 88% | 2539 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 47,500 psi | 86% | 2536 fps | 99% |
| Rottweil R 903 | <<locked>> | 98% | 47,587 psi | 86% | 2595 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 46,760 psi | 85% | 2569 fps | 99.8% |
| Shooters World Precision | <<locked>> | 94% | 47,935 psi | 87% | 2566 fps | 99.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 47,239 psi | 86% | 2503 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 49,429 psi | 90% | 2651 fps | 98.3% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 47,297 psi | 86% | 2503 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 49,240 psi | 89% | 2575 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 49,792 psi | 90% | 2605 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 49,559 psi | 90% | 2503 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 48,878 psi | 89% | 2500 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 48,660 psi | 88% | 2582 fps | 99.3% |
| Somchem S335 | <<locked>> | 90% | 48,573 psi | 88% | 2503 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 48,530 psi | 88% | 2572 fps | 98.1% |
| Somchem S355 | <<locked>> | 98% | 48,428 psi | 88% | 2595 fps | 98.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,217 psi | 68% | 2480 fps | 97.4% |
| Vihtavuori N130 | <<locked>> | 86% | 49,574 psi | 90% | 2484 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 49,400 psi | 90% | 2497 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 49,153 psi | 89% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 47,805 psi | 87% | 2536 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 46,862 psi | 85% | 2539 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 88% | 48,298 psi | 88% | 2552 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 94% | 49,008 psi | 89% | 2572 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,629 psi | 83% | 2530 fps | 98% |
| Winchester 748 | <<locked>> | 88% | 46,659 psi | 85% | 2585 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 92% | 49,066 psi | 89% | 2612 fps | 98.8% |
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% | 38,566 psi | 70% | 2349 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 41,742 psi | 76% | 2438 fps | 99.5% |
| Accurate 2495 | <<locked>> | 80% | 31,038 psi | 56% | 2257 fps | 99.6% |
| Accurate 2520 | <<locked>> | 80% | 36,840 psi | 67% | 2382 fps | 98.5% |
| Accurate 4064 | <<locked>> | 80% | 29,399 psi | 53% | 2234 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 82% | 37,753 psi | 69% | 2388 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 88% | 38,667 psi | 70% | 2392 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 46,456 psi | 84% | 2530 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,188 psi | 67% | 2356 fps | 96.9% |
| Alliant AR-Comp | <<locked>> | 80% | 35,708 psi | 65% | 2369 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,685 psi | 77% | 2533 fps | 97.7% |
| Alliant Power Pro 2000-MR | 47.3 gr | 88% | 41,481 psi | 75% | 2549 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 32,895 psi | 60% | 2310 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,932 psi | 80% | 2448 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 38,072 psi | 69% | 2418 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 92% | 37,246 psi | 68% | 2470 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,687 psi | 83% | 2428 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 41,742 psi | 76% | 2487 fps | 95.5% |
| Bofors RP3 | <<locked>> | 86% | 34,171 psi | 62% | 2356 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,450 psi | 72% | 2359 fps | 98% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,099 psi | 64% | 2365 fps | 97% |
| Hodgdon CFE223 | <<locked>> | 80% | 38,609 psi | 70% | 2477 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 42,409 psi | 77% | 2464 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,931 psi | 78% | 2480 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 92% | 43,497 psi | 79% | 2513 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 35,433 psi | 64% | 2349 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 35,998 psi | 65% | 2388 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 33,808 psi | 61% | 2359 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,411 psi | 46% | 1407 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,316 psi | 62% | 2306 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 34,200 psi | 62% | 2362 fps | 99.6% |
| IMR 4064 | <<locked>> | 86% | 38,101 psi | 69% | 2372 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 44,788 psi | 81% | 2418 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 36,550 psi | 66% | 2398 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 37,188 psi | 67% | 2356 fps | 96.9% |
| Lovex D073.5 | <<locked>> | 80% | 41,423 psi | 75% | 2438 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 80% | 33,359 psi | 61% | 2320 fps | 97.6% |
| Lovex S060 | <<locked>> | 80% | 36,332 psi | 66% | 2293 fps | 95.2% |
| Lovex S062 | <<locked>> | 82% | 33,112 psi | 60% | 2283 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 34,780 psi | 63% | 2303 fps | 96.3% |
| Norma 202 | <<locked>> | 80% | 34,592 psi | 63% | 2320 fps | 98.5% |
| Norma 203B | <<locked>> | 86% | 37,391 psi | 68% | 2408 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 86% | 36,970 psi | 67% | 2415 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,013 psi | 65% | 2365 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,596 psi | 74% | 2402 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,657 psi | 47% | 1444 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,800 psi | 76% | 2441 fps | 99.1% |
| ReloadSwiss RS 52 | 44.8 gr | 86% | 39,349 psi | 71% | 2507 fps | 95.5% |
| ReloadSwiss RS 60 | 44.4 gr | 84% | 30,618 psi | 56% | 2313 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 38,247 psi | 69% | 2359 fps | 99% |
| Rottweil R 902 | <<locked>> | 80% | 33,025 psi | 60% | 2257 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 88% | 34,330 psi | 62% | 2349 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,359 psi | 61% | 2320 fps | 97.6% |
| Shooters World Precision | <<locked>> | 82% | 33,112 psi | 60% | 2283 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,338 psi | 80% | 2457 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 38,421 psi | 70% | 2451 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,280 psi | 80% | 2457 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 45,890 psi | 83% | 2520 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 36,172 psi | 66% | 2356 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,361 psi | 66% | 2280 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,617 psi | 54% | 2152 fps | 98% |
| Somchem S321 | <<locked>> | 80% | 39,668 psi | 72% | 2428 fps | 97.9% |
| Somchem S335 | <<locked>> | 80% | 35,984 psi | 65% | 2287 fps | 99.3% |
| Somchem S341 | <<locked>> | 82% | 37,115 psi | 67% | 2369 fps | 95.3% |
| Somchem S355 | <<locked>> | 88% | 35,549 psi | 65% | 2359 fps | 95.6% |
| Somchem S365 | <<locked>> | 96% | 32,663 psi | 59% | 2372 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 41,292 psi | 75% | 2359 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,347 psi | 66% | 2287 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 31,502 psi | 57% | 2257 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 80% | 32,619 psi | 59% | 2260 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 84% | 29,820 psi | 54% | 2211 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 37,115 psi | 67% | 2352 fps | 97% |
| Vihtavuori N540 | <<locked>> | 80% | 31,314 psi | 57% | 2244 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 37,405 psi | 68% | 2375 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 35,708 psi | 65% | 2382 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 35,186 psi | 64% | 2356 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 76 powders for 8 x 57 I loaded with the .321 | 180gr | Frontier PH HPFB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,700 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.321" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon Hybrid 100V, 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for 8 x 57 I with the .321 | 180gr | Frontier PH HPFB 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.