Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 196gr | Sellier & Bellot HPC bullet and 63 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 2015 | <<locked>> | 82% | 42,467 psi | 89% | 2346 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 42,221 psi | 88% | 2395 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 42,380 psi | 89% | 2428 fps | 99.7% |
| Accurate 2520 | <<locked>> | 84% | 42,380 psi | 89% | 2428 fps | 99.7% |
| Accurate 4064 | <<locked>> | 90% | 42,221 psi | 88% | 2428 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,844 psi | 90% | 2497 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 84% | 41,582 psi | 87% | 2398 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 90% | 42,467 psi | 89% | 2398 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 41,249 psi | 86% | 2369 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 84% | 42,772 psi | 89% | 2411 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 42,960 psi | 90% | 2516 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 41,350 psi | 86% | 2418 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 88% | 42,264 psi | 88% | 2434 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 98% | 41,162 psi | 86% | 2461 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 41,162 psi | 86% | 2493 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 43,279 psi | 90% | 2451 fps | 96.7% |
| Bofors RP3 | <<locked>> | 90% | 40,944 psi | 86% | 2421 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 43,294 psi | 90% | 2362 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 84% | 41,785 psi | 87% | 2428 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 82% | 43,004 psi | 90% | 2500 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 41,872 psi | 87% | 2411 fps | 98% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,972 psi | 84% | 2408 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 42,772 psi | 89% | 2477 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,403 psi | 72% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 42,279 psi | 88% | 2402 fps | 98% |
| IMR 3031 | <<locked>> | 88% | 42,221 psi | 88% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 41,408 psi | 87% | 2372 fps | 96.9% |
| IMR 4895 | <<locked>> | 88% | 43,192 psi | 90% | 2461 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 82% | 41,249 psi | 86% | 2369 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 86% | 42,656 psi | 89% | 2431 fps | 99.7% |
| Lovex S060 | <<locked>> | 84% | 42,380 psi | 89% | 2349 fps | 97.6% |
| Lovex S062 | <<locked>> | 88% | 41,408 psi | 87% | 2385 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 40,872 psi | 85% | 2362 fps | 98.4% |
| Norma 202 | <<locked>> | 84% | 40,828 psi | 85% | 2372 fps | 99.8% |
| Norma 203B | <<locked>> | 88% | 41,466 psi | 87% | 2421 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 88% | 41,046 psi | 86% | 2431 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 42,902 psi | 90% | 2431 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,853 psi | 73% | 1572 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 41,060 psi | 86% | 2474 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 41,147 psi | 86% | 2503 fps | 99.5% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,062 psi | 90% | 2516 fps | 96% |
| Rottweil R 901 | <<locked>> | 82% | 42,250 psi | 88% | 2362 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 86% | 41,060 psi | 86% | 2359 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 92% | 40,857 psi | 85% | 2415 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 86% | 42,656 psi | 89% | 2431 fps | 99.7% |
| Shooters World Precision | <<locked>> | 88% | 41,408 psi | 87% | 2385 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 42,627 psi | 89% | 2470 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 42,786 psi | 89% | 2421 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 42,830 psi | 89% | 2329 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 42,148 psi | 88% | 2329 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 42,105 psi | 88% | 2333 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 41,321 psi | 86% | 2385 fps | 97.2% |
| Somchem S355 | <<locked>> | 92% | 42,032 psi | 88% | 2421 fps | 98% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,827 psi | 81% | 2454 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 84% | 42,844 psi | 90% | 2329 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 42,554 psi | 89% | 2392 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 40,988 psi | 86% | 2356 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 94% | 42,830 psi | 89% | 2408 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 98% | 43,105 psi | 90% | 2454 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 82% | 41,017 psi | 86% | 2359 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 88% | 42,018 psi | 88% | 2392 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 41,336 psi | 86% | 2392 fps | 97.7% |
| Winchester 748 | <<locked>> | 82% | 43,120 psi | 90% | 2457 fps | 99.4% |
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% | 40,132 psi | 84% | 2306 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,561 psi | 68% | 2224 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 37,115 psi | 78% | 2333 fps | 99% |
| Accurate 2520 | <<locked>> | 80% | 37,115 psi | 78% | 2333 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 30,792 psi | 64% | 2205 fps | 98.4% |
| Accurate 4350 | <<locked>> | 98% | 40,074 psi | 84% | 2448 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 36,593 psi | 76% | 2300 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 37,579 psi | 79% | 2306 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,537 psi | 81% | 2316 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 37,333 psi | 78% | 2326 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 40,219 psi | 84% | 2461 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,140 psi | 67% | 2231 fps | 95.6% |
| Alliant Reloder-15 | <<locked>> | 84% | 37,101 psi | 78% | 2333 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 38,812 psi | 81% | 2411 fps | 95% |
| Alliant Reloder-17 | 47.5 gr | 88% | 33,997 psi | 71% | 2336 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,971 psi | 79% | 2346 fps | 95.1% |
| Bofors RP3 | <<locked>> | 82% | 31,328 psi | 65% | 2224 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,756 psi | 85% | 2320 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,477 psi | 76% | 2329 fps | 97.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,234 psi | 84% | 2444 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 80% | 36,796 psi | 77% | 2313 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,214 psi | 69% | 2267 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,024 psi | 65% | 2228 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,686 psi | 54% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,025 psi | 69% | 2215 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 32,779 psi | 68% | 2264 fps | 99.7% |
| IMR 4064 | <<locked>> | 86% | 36,811 psi | 77% | 2283 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 33,315 psi | 70% | 2264 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 38,537 psi | 81% | 2316 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 80% | 34,809 psi | 73% | 2287 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 37,550 psi | 78% | 2254 fps | 96.3% |
| Lovex S062 | <<locked>> | 80% | 32,372 psi | 68% | 2201 fps | 96.2% |
| Norma 201 | <<locked>> | 80% | 36,100 psi | 75% | 2270 fps | 97.3% |
| Norma 202 | <<locked>> | 80% | 35,998 psi | 75% | 2283 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 34,229 psi | 72% | 2277 fps | 95.3% |
| Ramshot Big Game | 46 gr | 84% | 35,926 psi | 75% | 2329 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,565 psi | 78% | 2333 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,701 psi | 54% | 1398 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 35,752 psi | 75% | 2365 fps | 95% |
| ReloadSwiss RS 60 | 44.2 gr | 82% | 29,791 psi | 62% | 2234 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 40,205 psi | 84% | 2464 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 39,711 psi | 83% | 2316 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 34,330 psi | 72% | 2224 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 31,415 psi | 66% | 2221 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,809 psi | 73% | 2287 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 32,372 psi | 68% | 2201 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,186 psi | 74% | 2320 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,244 psi | 74% | 2274 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,710 psi | 79% | 2241 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,879 psi | 65% | 2119 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 37,304 psi | 78% | 2247 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 36,143 psi | 76% | 2287 fps | 95.7% |
| Somchem S355 | <<locked>> | 84% | 32,808 psi | 69% | 2234 fps | 95.3% |
| Somchem S365 | <<locked>> | 92% | 30,240 psi | 63% | 2254 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 37,753 psi | 79% | 2244 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,982 psi | 69% | 2221 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 33,953 psi | 71% | 2224 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 29,080 psi | 61% | 2133 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 96% | 40,524 psi | 85% | 2405 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 38,537 psi | 81% | 2313 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 80% | 32,503 psi | 68% | 2208 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,098 psi | 71% | 2247 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 40,248 psi | 84% | 2405 fps | 99% |
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 87 powders for 8 x 57 IRS loaded with the .323 | 196gr | Sellier & Bellot HPC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,516 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,516 fps. Accurate 4350 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 196.0 gr projectile in 0.323" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-23, Hodgdon Hybrid 100V 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 | Sellier & Bellot HPC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-23, Bofors RP7, Hodgdon H414 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.