Load Specifications
Load data in caliber 8 x 57 IRS with .322 | 175gr | Frontier PH HPFB bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon LEVERevolution and Winchester StaBALL Match.
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>> | 84% | 42,482 psi | 89% | 2497 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 43,163 psi | 90% | 2539 fps | 99.4% |
| Accurate 2495 | <<locked>> | 90% | 41,423 psi | 87% | 2536 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 40,944 psi | 86% | 2536 fps | 98.9% |
| Accurate 4064 | <<locked>> | 92% | 41,553 psi | 87% | 2566 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 41,553 psi | 87% | 2539 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 41,133 psi | 86% | 2507 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 86% | 42,293 psi | 88% | 2566 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 40,872 psi | 85% | 2552 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 40,988 psi | 86% | 2621 fps | 96.2% |
| Bofors RP3 | <<locked>> | 94% | 43,163 psi | 90% | 2608 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 40,959 psi | 86% | 2461 fps | 97.9% |
| Hodgdon BL-C2 | <<locked>> | 86% | 41,553 psi | 87% | 2569 fps | 98.1% |
| Hodgdon CFE223 | <<locked>> | 84% | 42,859 psi | 90% | 2638 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 86% | 41,829 psi | 87% | 2552 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 42,525 psi | 89% | 2618 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,026 psi | 71% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 43,062 psi | 90% | 2559 fps | 97.1% |
| IMR 3031 | <<locked>> | 88% | 42,815 psi | 89% | 2605 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 42,873 psi | 90% | 2602 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 84% | 41,133 psi | 86% | 2507 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 82% | 43,004 psi | 90% | 2539 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 88% | 42,119 psi | 88% | 2569 fps | 99.1% |
| Lovex S060 | <<locked>> | 86% | 42,496 psi | 89% | 2487 fps | 96.4% |
| Lovex S062 | <<locked>> | 90% | 41,278 psi | 86% | 2526 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 43,192 psi | 90% | 2546 fps | 98% |
| Norma 202 | <<locked>> | 86% | 40,538 psi | 85% | 2513 fps | 99.2% |
| Norma 203B | <<locked>> | 90% | 41,118 psi | 86% | 2556 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 42,815 psi | 89% | 2572 fps | 96.5% |
| Ramshot X-Terminator | <<locked>> | 82% | 42,134 psi | 88% | 2503 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,374 psi | 72% | 1670 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 41,031 psi | 86% | 2638 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 84% | 42,018 psi | 88% | 2507 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 88% | 40,814 psi | 85% | 2493 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 96% | 43,062 psi | 90% | 2598 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 42,119 psi | 88% | 2569 fps | 99.1% |
| Shooters World Precision | <<locked>> | 90% | 41,278 psi | 86% | 2526 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 42,250 psi | 88% | 2602 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 42,525 psi | 89% | 2559 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 42,772 psi | 89% | 2474 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 41,974 psi | 88% | 2470 fps | 99.8% |
| Somchem S321 | <<locked>> | 82% | 41,162 psi | 86% | 2530 fps | 97.7% |
| Somchem S335 | <<locked>> | 86% | 42,003 psi | 88% | 2474 fps | 99.7% |
| Somchem S341 | <<locked>> | 86% | 41,176 psi | 86% | 2523 fps | 95.9% |
| Somchem S355 | <<locked>> | 94% | 41,568 psi | 87% | 2552 fps | 96.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,984 psi | 75% | 2520 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 42,917 psi | 90% | 2464 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 42,656 psi | 89% | 2474 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 42,090 psi | 88% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 40,828 psi | 85% | 2500 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 96% | 42,496 psi | 89% | 2546 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 84% | 41,118 psi | 86% | 2503 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 90% | 41,959 psi | 88% | 2536 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 41,379 psi | 86% | 2523 fps | 96.3% |
| Winchester 748 | <<locked>> | 86% | 42,482 psi | 89% | 2592 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 41,553 psi | 87% | 2559 fps | 96.9% |
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% | 37,289 psi | 78% | 2402 fps | 99.9% |
| Accurate 2460 | <<locked>> | 80% | 40,408 psi | 84% | 2487 fps | 99% |
| Accurate 2495 | <<locked>> | 80% | 29,907 psi | 62% | 2303 fps | 99.2% |
| Accurate 2520 | <<locked>> | 80% | 35,737 psi | 75% | 2434 fps | 97.8% |
| Accurate 4064 | <<locked>> | 80% | 28,326 psi | 59% | 2277 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 84% | 38,928 psi | 81% | 2487 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,274 psi | 76% | 2405 fps | 96% |
| Alliant AR-Comp | <<locked>> | 80% | 34,534 psi | 72% | 2425 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 36,187 psi | 76% | 2457 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 38,421 psi | 80% | 2562 fps | 95.3% |
| Bofors RP3 | <<locked>> | 88% | 35,317 psi | 74% | 2451 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,435 psi | 80% | 2411 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,808 psi | 71% | 2408 fps | 96% |
| Hodgdon CFE223 | <<locked>> | 82% | 40,161 psi | 84% | 2582 fps | 95% |
| Hodgdon H4895 | <<locked>> | 82% | 36,651 psi | 77% | 2444 fps | 95.4% |
| Hodgdon LEVERevolution | 46.4 gr | 84% | 35,041 psi | 73% | 2457 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,121 psi | 52% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 37,985 psi | 79% | 2457 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 33,098 psi | 69% | 2411 fps | 99.2% |
| IMR 4895 | <<locked>> | 86% | 37,753 psi | 79% | 2497 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 36,274 psi | 76% | 2405 fps | 96% |
| Lovex D073.5 | <<locked>> | 80% | 40,205 psi | 84% | 2490 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 32,198 psi | 67% | 2365 fps | 96.7% |
| Lovex S060 | <<locked>> | 82% | 37,797 psi | 79% | 2392 fps | 95% |
| Lovex S062 | <<locked>> | 84% | 34,229 psi | 72% | 2379 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 33,765 psi | 71% | 2349 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 33,547 psi | 70% | 2369 fps | 97.8% |
| Norma 203B | <<locked>> | 88% | 38,493 psi | 80% | 2503 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 39,871 psi | 83% | 2516 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,349 psi | 82% | 2448 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,309 psi | 53% | 1490 fps | 100% |
| ReloadSwiss RS 60 | 47.7 gr | 86% | 31,763 psi | 66% | 2408 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 37,318 psi | 78% | 2411 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 34,113 psi | 71% | 2352 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 90% | 35,462 psi | 74% | 2448 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,198 psi | 67% | 2365 fps | 96.7% |
| Shooters World Precision | <<locked>> | 84% | 34,229 psi | 72% | 2379 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 39,610 psi | 83% | 2546 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 39,871 psi | 83% | 2507 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,549 psi | 74% | 2333 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,877 psi | 60% | 2201 fps | 97.3% |
| Somchem S321 | <<locked>> | 80% | 38,537 psi | 81% | 2477 fps | 97.1% |
| Somchem S335 | <<locked>> | 80% | 34,983 psi | 73% | 2339 fps | 98.8% |
| Somchem S341 | <<locked>> | 84% | 38,566 psi | 81% | 2470 fps | 95.1% |
| Somchem S355 | <<locked>> | 90% | 36,608 psi | 76% | 2454 fps | 95.3% |
| Somchem S365 | <<locked>> | 98% | 33,736 psi | 70% | 2464 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 40,379 psi | 84% | 2418 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,476 psi | 74% | 2343 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 30,560 psi | 64% | 2310 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 31,604 psi | 66% | 2306 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 88% | 32,793 psi | 69% | 2349 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 35,897 psi | 75% | 2398 fps | 96% |
| Vihtavuori N540 | <<locked>> | 80% | 30,385 psi | 63% | 2290 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 38,885 psi | 81% | 2470 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 34,766 psi | 73% | 2431 fps | 96.6% |
| Winchester StaBALL Match | 46.8 gr | 84% | 36,434 psi | 76% | 2454 fps | 95.3% |
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 56 powders for 8 x 57 IRS loaded with the .322 | 175gr | Frontier PH HPFB. Hodgdon CFE223 delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,638 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.322" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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. ReloadSwiss RS 60, Hodgdon LEVERevolution, Winchester StaBALL Match rank at the top here: for 8 x 57 IRS with the .322 | 175gr | 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.