Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 181gr | Brenneke TOG bullet and 53 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% | 42,801 psi | 89% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 42,627 psi | 89% | 2530 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 42,815 psi | 89% | 2559 fps | 99.5% |
| Accurate 4064 | <<locked>> | 90% | 42,467 psi | 89% | 2559 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 41,887 psi | 88% | 2530 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 90% | 42,946 psi | 90% | 2530 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 41,452 psi | 87% | 2493 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 84% | 43,163 psi | 90% | 2546 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 41,800 psi | 87% | 2549 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 88% | 42,424 psi | 89% | 2559 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 41,655 psi | 87% | 2625 fps | 97.4% |
| Bofors RP3 | <<locked>> | 90% | 41,423 psi | 87% | 2556 fps | 98% |
| Hodgdon BL-C2 | <<locked>> | 84% | 42,148 psi | 88% | 2559 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 84% | 42,192 psi | 88% | 2539 fps | 97.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,393 psi | 84% | 2536 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 43,192 psi | 90% | 2612 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,592 psi | 72% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 42,482 psi | 89% | 2530 fps | 97.7% |
| IMR 3031 | <<locked>> | 88% | 42,438 psi | 89% | 2572 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 41,901 psi | 88% | 2503 fps | 96.6% |
| IMR 4895 | <<locked>> | 86% | 40,785 psi | 85% | 2543 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 82% | 41,452 psi | 87% | 2493 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 86% | 43,091 psi | 90% | 2562 fps | 99.6% |
| Lovex S060 | <<locked>> | 84% | 42,612 psi | 89% | 2474 fps | 97.3% |
| Lovex S062 | <<locked>> | 88% | 41,858 psi | 87% | 2516 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 41,075 psi | 86% | 2487 fps | 98.2% |
| Norma 202 | <<locked>> | 84% | 40,988 psi | 86% | 2500 fps | 99.6% |
| Norma 203B | <<locked>> | 88% | 41,698 psi | 87% | 2549 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 88% | 41,423 psi | 87% | 2562 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 43,207 psi | 90% | 2562 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,722 psi | 73% | 1667 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 41,466 psi | 87% | 2605 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 41,582 psi | 87% | 2638 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 42,337 psi | 88% | 2490 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 86% | 41,437 psi | 87% | 2487 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 92% | 41,336 psi | 86% | 2543 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 43,091 psi | 90% | 2562 fps | 99.6% |
| Shooters World Precision | <<locked>> | 88% | 41,858 psi | 87% | 2516 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 42,946 psi | 90% | 2598 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 43,178 psi | 90% | 2552 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 43,033 psi | 90% | 2457 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 42,380 psi | 89% | 2457 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 42,308 psi | 88% | 2461 fps | 99.9% |
| Somchem S341 | <<locked>> | 84% | 41,582 psi | 87% | 2513 fps | 96.9% |
| Somchem S355 | <<locked>> | 92% | 42,351 psi | 88% | 2549 fps | 97.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,218 psi | 82% | 2582 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 84% | 43,033 psi | 90% | 2457 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 42,960 psi | 90% | 2526 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 41,452 psi | 87% | 2487 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 92% | 40,611 psi | 85% | 2490 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 82% | 41,423 psi | 87% | 2490 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 88% | 42,554 psi | 89% | 2526 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 41,843 psi | 87% | 2523 fps | 97.5% |
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% | 40,350 psi | 84% | 2434 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,677 psi | 68% | 2339 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 37,376 psi | 78% | 2454 fps | 98.7% |
| Accurate 4064 | <<locked>> | 80% | 30,908 psi | 65% | 2316 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 80% | 36,970 psi | 77% | 2428 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 86% | 37,898 psi | 79% | 2431 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,914 psi | 81% | 2444 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 80% | 37,550 psi | 78% | 2454 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,474 psi | 68% | 2352 fps | 95.2% |
| Alliant Reloder-15 | <<locked>> | 84% | 37,391 psi | 78% | 2457 fps | 95.2% |
| Alliant Reloder-17 | 52.3 gr | 90% | 36,579 psi | 76% | 2513 fps | 95.7% |
| Bofors RP3 | <<locked>> | 82% | 31,676 psi | 66% | 2346 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,883 psi | 77% | 2454 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 80% | 37,202 psi | 78% | 2438 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,549 psi | 74% | 2431 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 33,431 psi | 70% | 2402 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 53% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,331 psi | 74% | 2382 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 32,938 psi | 69% | 2382 fps | 99.5% |
| IMR 4064 | <<locked>> | 86% | 37,086 psi | 77% | 2408 fps | 95.1% |
| IMR 4895 | <<locked>> | 82% | 35,897 psi | 75% | 2438 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 38,914 psi | 81% | 2444 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 80% | 35,012 psi | 73% | 2405 fps | 98.2% |
| Lovex S060 | <<locked>> | 80% | 37,884 psi | 79% | 2379 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 32,663 psi | 68% | 2323 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 36,201 psi | 76% | 2388 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 36,274 psi | 76% | 2408 fps | 99% |
| Norma 203B | <<locked>> | 84% | 36,724 psi | 77% | 2448 fps | 95.7% |
| Ramshot Big Game | 49.5 gr | 84% | 36,245 psi | 76% | 2451 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,739 psi | 79% | 2454 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,744 psi | 54% | 1490 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 38,638 psi | 81% | 2546 fps | 95.5% |
| ReloadSwiss RS 60 | 47.6 gr | 82% | 30,037 psi | 63% | 2352 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 40,001 psi | 84% | 2444 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 34,490 psi | 72% | 2343 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 86% | 33,924 psi | 71% | 2392 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,012 psi | 73% | 2405 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 32,663 psi | 68% | 2323 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 37,739 psi | 79% | 2490 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,433 psi | 74% | 2392 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,971 psi | 79% | 2365 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,111 psi | 65% | 2234 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 37,376 psi | 78% | 2369 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 36,434 psi | 76% | 2408 fps | 95.3% |
| Somchem S355 | <<locked>> | 86% | 35,215 psi | 74% | 2405 fps | 95.7% |
| Somchem S365 | <<locked>> | 94% | 32,474 psi | 68% | 2421 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 80% | 38,072 psi | 80% | 2369 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,286 psi | 70% | 2343 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 34,171 psi | 71% | 2343 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 29,356 psi | 61% | 2247 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 38,827 psi | 81% | 2441 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 32,764 psi | 68% | 2326 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 36,724 psi | 77% | 2418 fps | 95.9% |
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 83 powders for 8 x 57 IRS loaded with the .323 | 181gr | Brenneke TOG. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,638 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 181.0 gr projectile in 0.323" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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. ReloadSwiss RS 60, Alliant Reloder-17, Ramshot Big Game rank at the top here: for 8 x 57 IRS with the .323 | 181gr | Brenneke TOG 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.