Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 196gr | Norma ORYX 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, Alliant Reloder-17 and Ramshot Big Game.
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 2495 | <<locked>> | 88% | 42,743 psi | 89% | 2408 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 41,843 psi | 87% | 2411 fps | 99.6% |
| Accurate 4064 | <<locked>> | 90% | 43,033 psi | 90% | 2448 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 40,988 psi | 86% | 2470 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 84% | 42,293 psi | 88% | 2418 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 90% | 43,134 psi | 90% | 2415 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 41,713 psi | 87% | 2382 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 82% | 40,611 psi | 85% | 2382 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 40,770 psi | 85% | 2480 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 42,061 psi | 88% | 2434 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 88% | 42,670 psi | 89% | 2444 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 41,713 psi | 87% | 2477 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 94% | 41,916 psi | 88% | 2513 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 41,147 psi | 86% | 2415 fps | 96.2% |
| Bofors RP3 | <<locked>> | 90% | 41,626 psi | 87% | 2441 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 84% | 42,467 psi | 89% | 2444 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 90% | 43,091 psi | 90% | 2444 fps | 96% |
| Hodgdon H4895 | <<locked>> | 84% | 42,641 psi | 89% | 2428 fps | 98.2% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,480 psi | 85% | 2425 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 40,669 psi | 85% | 2444 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,577 psi | 72% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 40,959 psi | 86% | 2385 fps | 97.8% |
| IMR 3031 | <<locked>> | 84% | 41,423 psi | 87% | 2431 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 42,656 psi | 89% | 2402 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,192 psi | 88% | 2474 fps | 96.5% |
| IMR 4895 | <<locked>> | 86% | 41,118 psi | 86% | 2428 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 82% | 41,713 psi | 87% | 2382 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 84% | 40,567 psi | 85% | 2398 fps | 99.5% |
| Lovex S060 | <<locked>> | 84% | 43,076 psi | 90% | 2365 fps | 97.8% |
| Lovex S062 | <<locked>> | 88% | 42,148 psi | 88% | 2405 fps | 98.8% |
| Norma 201 | <<locked>> | 84% | 41,321 psi | 86% | 2375 fps | 98.6% |
| Norma 202 | <<locked>> | 84% | 41,292 psi | 86% | 2388 fps | 99.8% |
| Norma 203B | <<locked>> | 88% | 41,916 psi | 88% | 2434 fps | 97.6% |
| Norma URP | <<locked>> | 98% | 41,495 psi | 87% | 2467 fps | 96% |
| Ramshot Big Game | <<locked>> | 88% | 41,611 psi | 87% | 2448 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 40,582 psi | 85% | 2395 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,766 psi | 73% | 1575 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 41,785 psi | 87% | 2490 fps | 97% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 41,901 psi | 88% | 2526 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 42,786 psi | 89% | 2379 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 86% | 41,785 psi | 87% | 2375 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 92% | 41,539 psi | 87% | 2431 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 40,567 psi | 85% | 2398 fps | 99.5% |
| Shooters World Precision | <<locked>> | 88% | 42,148 psi | 88% | 2405 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 43,192 psi | 90% | 2484 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 40,712 psi | 85% | 2388 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 40,741 psi | 85% | 2300 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 42,583 psi | 89% | 2343 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 42,540 psi | 89% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 41,989 psi | 88% | 2402 fps | 97.5% |
| Somchem S355 | <<locked>> | 92% | 42,714 psi | 89% | 2438 fps | 98.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,305 psi | 82% | 2467 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 82% | 40,785 psi | 85% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 40,698 psi | 85% | 2365 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 41,698 psi | 87% | 2372 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 92% | 40,828 psi | 85% | 2379 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 82% | 41,742 psi | 87% | 2379 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 88% | 42,656 psi | 89% | 2408 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 98% | 42,801 psi | 89% | 2474 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 41,974 psi | 88% | 2411 fps | 98% |
| Winchester 748 | <<locked>> | 82% | 40,495 psi | 85% | 2415 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 42,453 psi | 89% | 2438 fps | 98.2% |
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 2495 | <<locked>> | 80% | 33,127 psi | 69% | 2238 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,073 psi | 82% | 2362 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 31,343 psi | 65% | 2218 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 38,087 psi | 80% | 2415 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 37,260 psi | 78% | 2320 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 36,027 psi | 75% | 2277 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,276 psi | 82% | 2336 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 80% | 38,014 psi | 79% | 2339 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 38,174 psi | 80% | 2425 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,661 psi | 64% | 2198 fps | 95.1% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,360 psi | 74% | 2300 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,349 psi | 82% | 2428 fps | 95.4% |
| Alliant Reloder-17 | 48.2 gr | 88% | 34,461 psi | 72% | 2352 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,580 psi | 81% | 2365 fps | 95.4% |
| Bofors RP3 | <<locked>> | 82% | 31,995 psi | 67% | 2244 fps | 95.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,144 psi | 78% | 2346 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 88% | 40,335 psi | 84% | 2392 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 37,536 psi | 78% | 2333 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,765 psi | 71% | 2283 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,373 psi | 70% | 2290 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,715 psi | 54% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,027 psi | 75% | 2287 fps | 96.5% |
| IMR 3031 | <<locked>> | 80% | 36,347 psi | 76% | 2339 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,505 psi | 74% | 2260 fps | 95.2% |
| IMR 4831 | <<locked>> | 98% | 39,421 psi | 82% | 2421 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 33,997 psi | 71% | 2283 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 39,276 psi | 82% | 2336 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 35,302 psi | 74% | 2300 fps | 98.7% |
| Lovex S060 | <<locked>> | 80% | 38,043 psi | 79% | 2270 fps | 96.6% |
| Lovex S062 | <<locked>> | 80% | 32,837 psi | 69% | 2218 fps | 96.4% |
| Norma 201 | <<locked>> | 80% | 36,637 psi | 77% | 2283 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 36,492 psi | 76% | 2297 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 34,722 psi | 73% | 2290 fps | 95.6% |
| Norma URP | <<locked>> | 96% | 39,073 psi | 82% | 2421 fps | 95.2% |
| Ramshot Big Game | 46.7 gr | 84% | 36,506 psi | 76% | 2349 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,985 psi | 79% | 2346 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,744 psi | 54% | 1404 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 36,405 psi | 76% | 2382 fps | 95.4% |
| ReloadSwiss RS 60 | 43.8 gr | 80% | 28,413 psi | 59% | 2201 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 40,277 psi | 84% | 2333 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 34,824 psi | 73% | 2241 fps | 97% |
| Rottweil R 903 | <<locked>> | 84% | 32,082 psi | 67% | 2241 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,302 psi | 74% | 2300 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 32,837 psi | 69% | 2218 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,752 psi | 75% | 2336 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,694 psi | 75% | 2287 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,247 psi | 80% | 2254 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,314 psi | 65% | 2133 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 37,768 psi | 79% | 2260 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 36,550 psi | 76% | 2300 fps | 96% |
| Somchem S355 | <<locked>> | 84% | 33,286 psi | 70% | 2251 fps | 95.6% |
| Somchem S365 | <<locked>> | 92% | 30,719 psi | 64% | 2270 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 38,305 psi | 80% | 2260 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,562 psi | 70% | 2238 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,476 psi | 72% | 2238 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 82% | 29,530 psi | 62% | 2146 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 39,001 psi | 81% | 2329 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 80% | 33,141 psi | 69% | 2228 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 96% | 40,059 psi | 84% | 2425 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,693 psi | 72% | 2267 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 37,811 psi | 79% | 2362 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,737 psi | 73% | 2287 fps | 96.2% |
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 | 196gr | Norma ORYX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,526 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,526 fps. Hodgdon Hybrid 100V 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 72–90 %, leaving at least 10 % headroom. The 196.0 gr projectile in 0.323" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, Hodgdon TrailBoss, IMR 4831 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, Alliant Reloder-17, Ramshot Big Game rank at the top here: for 8 x 57 IRS with the .323 | 196gr | Norma ORYX 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.