Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 180gr | Fox Classic Hunter bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Hodgdon LEVERevolution.
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>> | 86% | 42,888 psi | 90% | 2461 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 40,988 psi | 86% | 2461 fps | 99.2% |
| Accurate 2495 | <<locked>> | 92% | 41,321 psi | 86% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 42,917 psi | 90% | 2543 fps | 99.2% |
| Accurate 4064 | <<locked>> | 94% | 41,336 psi | 86% | 2523 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 88% | 42,090 psi | 88% | 2507 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 94% | 43,265 psi | 90% | 2507 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 41,887 psi | 88% | 2477 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 88% | 42,989 psi | 90% | 2533 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 42,293 psi | 88% | 2559 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 41,524 psi | 87% | 2520 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 82% | 43,221 psi | 90% | 2474 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 42,569 psi | 89% | 2536 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 98% | 41,698 psi | 87% | 2592 fps | 96.5% |
| Bofors RP3 | <<locked>> | 94% | 40,843 psi | 85% | 2523 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 41,887 psi | 88% | 2434 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 88% | 42,206 psi | 88% | 2539 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 84% | 41,669 psi | 87% | 2487 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 88% | 42,322 psi | 88% | 2520 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 43,236 psi | 90% | 2585 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,692 psi | 70% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 42,786 psi | 89% | 2510 fps | 97.1% |
| IMR 3031 | <<locked>> | 92% | 42,134 psi | 88% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 41,858 psi | 87% | 2477 fps | 95.8% |
| IMR 4895 | <<locked>> | 90% | 40,596 psi | 85% | 2513 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 86% | 41,887 psi | 88% | 2477 fps | 97.6% |
| Lovex D073.5 | <<locked>> | 82% | 40,654 psi | 85% | 2457 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 90% | 42,612 psi | 89% | 2536 fps | 99.2% |
| Lovex S060 | <<locked>> | 86% | 40,785 psi | 85% | 2411 fps | 96% |
| Lovex S062 | <<locked>> | 92% | 41,684 psi | 87% | 2493 fps | 97.7% |
| Norma 201 | <<locked>> | 88% | 41,147 psi | 86% | 2467 fps | 97.6% |
| Norma 202 | <<locked>> | 88% | 41,176 psi | 86% | 2484 fps | 99.4% |
| Norma 203B | <<locked>> | 92% | 41,756 psi | 87% | 2526 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 92% | 41,684 psi | 87% | 2539 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 86% | 40,756 psi | 85% | 2490 fps | 95.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 43,076 psi | 90% | 2477 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,707 psi | 70% | 1624 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 41,582 psi | 87% | 2470 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 41,930 psi | 88% | 2612 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 42,134 psi | 88% | 2467 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 90% | 41,350 psi | 86% | 2464 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 96% | 40,741 psi | 85% | 2513 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 42,612 psi | 89% | 2536 fps | 99.2% |
| Shooters World Precision | <<locked>> | 92% | 41,684 psi | 87% | 2493 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 43,091 psi | 90% | 2572 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 40,698 psi | 85% | 2480 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 40,770 psi | 85% | 2395 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 42,757 psi | 89% | 2441 fps | 99.9% |
| Somchem S321 | <<locked>> | 84% | 41,930 psi | 88% | 2503 fps | 98% |
| Somchem S335 | <<locked>> | 88% | 42,641 psi | 89% | 2444 fps | 99.8% |
| Somchem S341 | <<locked>> | 88% | 42,003 psi | 88% | 2493 fps | 96.2% |
| Somchem S355 | <<locked>> | 96% | 41,916 psi | 88% | 2520 fps | 96.9% |
| Vihtavuori N130 | <<locked>> | 82% | 41,031 psi | 86% | 2388 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 40,727 psi | 85% | 2398 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 42,511 psi | 89% | 2503 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 41,698 psi | 87% | 2470 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 98% | 43,236 psi | 90% | 2513 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 86% | 41,930 psi | 88% | 2474 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 92% | 42,728 psi | 89% | 2507 fps | 99.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 42,453 psi | 89% | 2497 fps | 96.7% |
| Winchester 748 | <<locked>> | 84% | 40,814 psi | 85% | 2520 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 82% | 40,814 psi | 85% | 2500 fps | 96.7% |
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% | 35,433 psi | 74% | 2326 fps | 99.8% |
| Accurate 2460 | <<locked>> | 80% | 38,189 psi | 80% | 2408 fps | 98.7% |
| Accurate 2495 | <<locked>> | 80% | 27,485 psi | 57% | 2211 fps | 98.7% |
| Accurate 2520 | <<locked>> | 80% | 32,256 psi | 67% | 2329 fps | 96.8% |
| Accurate 4064 | <<locked>> | 80% | 26,092 psi | 55% | 2185 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 86% | 39,523 psi | 83% | 2457 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 92% | 40,625 psi | 85% | 2457 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,621 psi | 72% | 2333 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 32,866 psi | 69% | 2352 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 39,552 psi | 83% | 2507 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 34,156 psi | 71% | 2372 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,712 psi | 85% | 2431 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,697 psi | 83% | 2484 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 39,160 psi | 82% | 2536 fps | 95.6% |
| Bofors RP3 | <<locked>> | 90% | 35,462 psi | 74% | 2415 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,985 psi | 77% | 2339 fps | 96.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,952 psi | 67% | 2326 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 36,477 psi | 76% | 2388 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 84% | 37,260 psi | 78% | 2418 fps | 95.7% |
| Hodgdon LEVERevolution | 45.6 gr | 88% | 35,621 psi | 74% | 2431 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,918 psi | 52% | 1417 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,927 psi | 79% | 2415 fps | 95.7% |
| IMR 3031 | 37.9 gr | 80% | 28,572 psi | 60% | 2260 fps | 98% |
| IMR 4064 | <<locked>> | 92% | 39,523 psi | 83% | 2431 fps | 95.1% |
| IMR 4895 | <<locked>> | 88% | 38,058 psi | 80% | 2464 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 34,621 psi | 72% | 2333 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 80% | 37,869 psi | 79% | 2405 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 80% | 30,124 psi | 63% | 2280 fps | 96% |
| Lovex S060 | <<locked>> | 84% | 38,319 psi | 80% | 2362 fps | 95.3% |
| Lovex S062 | <<locked>> | 86% | 34,418 psi | 72% | 2346 fps | 95.7% |
| Norma 201 | <<locked>> | 82% | 33,939 psi | 71% | 2320 fps | 95.4% |
| Norma 202 | <<locked>> | 80% | 31,705 psi | 66% | 2290 fps | 97.3% |
| Norma 203B | <<locked>> | 90% | 38,914 psi | 81% | 2470 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 90% | 38,928 psi | 81% | 2484 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 38,043 psi | 79% | 2438 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 82% | 40,292 psi | 84% | 2425 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,801 psi | 52% | 1447 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,015 psi | 82% | 2421 fps | 98.2% |
| ReloadSwiss RS 60 | 46.8 gr | 88% | 32,140 psi | 67% | 2382 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 35,012 psi | 73% | 2326 fps | 98% |
| Rottweil R 902 | <<locked>> | 84% | 34,316 psi | 72% | 2323 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 92% | 35,665 psi | 75% | 2411 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,124 psi | 63% | 2280 fps | 96% |
| Shooters World Precision | <<locked>> | 86% | 34,418 psi | 72% | 2346 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 40,263 psi | 84% | 2516 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 38,000 psi | 79% | 2428 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,924 psi | 71% | 2260 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,398 psi | 57% | 2129 fps | 96.8% |
| Somchem S321 | <<locked>> | 80% | 36,753 psi | 77% | 2398 fps | 96.6% |
| Somchem S335 | <<locked>> | 80% | 33,170 psi | 69% | 2260 fps | 98.4% |
| Somchem S341 | <<locked>> | 86% | 39,189 psi | 82% | 2441 fps | 95.4% |
| Somchem S355 | <<locked>> | 92% | 36,869 psi | 77% | 2418 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 38,682 psi | 81% | 2349 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,895 psi | 71% | 2270 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 80% | 28,776 psi | 60% | 2231 fps | 98.9% |
| Vihtavuori N140 | <<locked>> | 80% | 29,878 psi | 62% | 2231 fps | 97% |
| Vihtavuori N150 | <<locked>> | 90% | 33,199 psi | 69% | 2323 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 34,243 psi | 72% | 2323 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 28,776 psi | 60% | 2215 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 39,668 psi | 83% | 2444 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 35,636 psi | 74% | 2411 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,811 psi | 79% | 2441 fps | 95.8% |
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 62 powders for 8 x 57 IRS loaded with the .323 | 180gr | Fox Classic Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,612 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,612 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 62 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.323" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Winchester 6.5 StaBALL 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, IMR 3031, Hodgdon LEVERevolution rank at the top here: for 8 x 57 IRS with the .323 | 180gr | Fox Classic Hunter 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.