Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 180gr | Barnes TSX BT 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 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>> | 84% | 41,742 psi | 87% | 2454 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 42,395 psi | 89% | 2497 fps | 99.5% |
| Accurate 2495 | <<locked>> | 90% | 40,611 psi | 85% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 43,236 psi | 90% | 2549 fps | 99.4% |
| Accurate 4064 | <<locked>> | 94% | 43,308 psi | 90% | 2569 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 41,046 psi | 86% | 2503 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 92% | 42,032 psi | 88% | 2500 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 40,640 psi | 85% | 2470 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 86% | 41,829 psi | 87% | 2526 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 40,698 psi | 85% | 2520 fps | 97.4% |
| Alliant Reloder-15 | <<locked>> | 90% | 41,408 psi | 87% | 2530 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 40,625 psi | 85% | 2589 fps | 96.5% |
| Bofors RP3 | <<locked>> | 94% | 42,583 psi | 89% | 2569 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 43,178 psi | 90% | 2477 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 86% | 41,060 psi | 86% | 2533 fps | 98.3% |
| Hodgdon CFE223 | <<locked>> | 84% | 42,511 psi | 89% | 2605 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 41,278 psi | 86% | 2513 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 42,163 psi | 88% | 2582 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,852 psi | 71% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 42,685 psi | 89% | 2523 fps | 97.3% |
| IMR 3031 | <<locked>> | 88% | 42,612 psi | 89% | 2572 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 41,495 psi | 87% | 2487 fps | 96% |
| IMR 4895 | <<locked>> | 90% | 42,395 psi | 89% | 2562 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 84% | 40,640 psi | 85% | 2470 fps | 97.6% |
| Lovex D073.5 | <<locked>> | 82% | 42,235 psi | 88% | 2500 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 88% | 41,524 psi | 87% | 2530 fps | 99.2% |
| Lovex S060 | <<locked>> | 86% | 42,279 psi | 88% | 2457 fps | 96.7% |
| Lovex S062 | <<locked>> | 92% | 43,236 psi | 90% | 2536 fps | 98.3% |
| Norma 201 | <<locked>> | 88% | 42,482 psi | 89% | 2507 fps | 98.1% |
| Norma 202 | <<locked>> | 88% | 42,786 psi | 89% | 2526 fps | 99.6% |
| Norma 203B | <<locked>> | 92% | 43,236 psi | 90% | 2569 fps | 97% |
| Ramshot Big Game | <<locked>> | 90% | 40,582 psi | 85% | 2533 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 86% | 42,424 psi | 89% | 2536 fps | 96.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 41,655 psi | 87% | 2467 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,881 psi | 71% | 1640 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 42,989 psi | 90% | 2510 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 43,062 psi | 90% | 2628 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 40,698 psi | 85% | 2605 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 84% | 41,046 psi | 86% | 2464 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 90% | 42,917 psi | 90% | 2507 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 96% | 42,482 psi | 89% | 2559 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 41,524 psi | 87% | 2530 fps | 99.2% |
| Shooters World Precision | <<locked>> | 92% | 43,236 psi | 90% | 2536 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 41,901 psi | 88% | 2566 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 42,119 psi | 88% | 2523 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 42,221 psi | 88% | 2434 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 41,539 psi | 87% | 2434 fps | 99.9% |
| Somchem S321 | <<locked>> | 82% | 40,872 psi | 85% | 2497 fps | 97.9% |
| Somchem S335 | <<locked>> | 86% | 41,350 psi | 86% | 2438 fps | 99.8% |
| Somchem S341 | <<locked>> | 86% | 40,770 psi | 85% | 2487 fps | 96.2% |
| Somchem S355 | <<locked>> | 94% | 41,046 psi | 86% | 2516 fps | 97% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,549 psi | 74% | 2487 fps | 96.5% |
| Vihtavuori N130 | <<locked>> | 82% | 42,322 psi | 88% | 2425 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 42,163 psi | 88% | 2438 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 41,539 psi | 87% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 43,207 psi | 90% | 2510 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 96% | 42,090 psi | 88% | 2510 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 84% | 40,596 psi | 85% | 2467 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 90% | 41,452 psi | 87% | 2497 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 41,118 psi | 86% | 2490 fps | 96.7% |
| Winchester 748 | <<locked>> | 86% | 42,090 psi | 88% | 2556 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 41,394 psi | 86% | 2530 fps | 97.2% |
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 2015 | <<locked>> | 80% | 36,753 psi | 77% | 2365 fps | 99.9% |
| Accurate 2460 | <<locked>> | 80% | 39,610 psi | 83% | 2448 fps | 99.1% |
| Accurate 2495 | <<locked>> | 80% | 28,747 psi | 60% | 2254 fps | 99.1% |
| Accurate 2520 | <<locked>> | 80% | 35,027 psi | 73% | 2392 fps | 97.9% |
| Accurate 4064 | <<locked>> | 80% | 27,267 psi | 57% | 2228 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 84% | 38,392 psi | 80% | 2448 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 90% | 39,537 psi | 83% | 2454 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,723 psi | 75% | 2369 fps | 96.2% |
| Alliant AR-Comp | <<locked>> | 80% | 34,185 psi | 71% | 2388 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 33,460 psi | 70% | 2369 fps | 95.1% |
| Alliant Reloder-15 | <<locked>> | 88% | 38,711 psi | 81% | 2477 fps | 95.1% |
| Alliant Reloder-17 | 51.8 gr | 94% | 38,029 psi | 79% | 2530 fps | 95.6% |
| Bofors RP3 | <<locked>> | 88% | 34,650 psi | 72% | 2411 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,087 psi | 80% | 2379 fps | 97.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,431 psi | 70% | 2372 fps | 96.2% |
| Hodgdon CFE223 | <<locked>> | 82% | 39,740 psi | 83% | 2546 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 82% | 36,303 psi | 76% | 2415 fps | 95.6% |
| Hodgdon LEVERevolution | 46.1 gr | 84% | 34,534 psi | 72% | 2418 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,106 psi | 52% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,041 psi | 73% | 2369 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 32,474 psi | 68% | 2372 fps | 99.2% |
| IMR 4064 | <<locked>> | 88% | 38,986 psi | 81% | 2438 fps | 95.2% |
| IMR 4895 | <<locked>> | 86% | 37,188 psi | 78% | 2461 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 35,723 psi | 75% | 2369 fps | 96.2% |
| Lovex D073.5 | <<locked>> | 80% | 39,450 psi | 82% | 2448 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 80% | 31,459 psi | 66% | 2323 fps | 96.8% |
| Lovex S060 | <<locked>> | 82% | 37,260 psi | 78% | 2356 fps | 95.2% |
| Lovex S062 | <<locked>> | 84% | 33,533 psi | 70% | 2339 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 32,938 psi | 69% | 2310 fps | 95.4% |
| Norma 202 | <<locked>> | 80% | 32,866 psi | 69% | 2329 fps | 97.9% |
| Norma 203B | <<locked>> | 88% | 37,942 psi | 79% | 2467 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 88% | 38,000 psi | 79% | 2480 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 36,883 psi | 77% | 2428 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,059 psi | 82% | 2415 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,005 psi | 52% | 1463 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,422 psi | 84% | 2464 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 40,147 psi | 84% | 2569 fps | 95.5% |
| ReloadSwiss RS 60 | 47.4 gr | 86% | 31,256 psi | 65% | 2375 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 36,318 psi | 76% | 2369 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 33,286 psi | 70% | 2310 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 90% | 34,780 psi | 73% | 2408 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,459 psi | 66% | 2323 fps | 96.8% |
| Shooters World Precision | <<locked>> | 84% | 33,533 psi | 70% | 2339 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 39,247 psi | 82% | 2513 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,057 psi | 77% | 2421 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,070 psi | 73% | 2300 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,442 psi | 59% | 2169 fps | 97.4% |
| Somchem S321 | <<locked>> | 80% | 37,985 psi | 79% | 2441 fps | 97.2% |
| Somchem S335 | <<locked>> | 80% | 34,258 psi | 72% | 2297 fps | 98.8% |
| Somchem S341 | <<locked>> | 84% | 38,116 psi | 80% | 2434 fps | 95.4% |
| Somchem S355 | <<locked>> | 90% | 36,230 psi | 76% | 2418 fps | 95.5% |
| Somchem S365 | <<locked>> | 98% | 33,199 psi | 69% | 2428 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 40,001 psi | 84% | 2385 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,099 psi | 73% | 2310 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 30,037 psi | 63% | 2270 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 80% | 31,154 psi | 65% | 2270 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 88% | 32,184 psi | 67% | 2313 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 35,534 psi | 74% | 2362 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 80% | 29,718 psi | 62% | 2251 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 38,522 psi | 80% | 2438 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 34,243 psi | 72% | 2395 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 35,940 psi | 75% | 2418 fps | 95.5% |
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 84 powders for 8 x 57 IRS loaded with the .323 | 180gr | Barnes TSX BT. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,628 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,628 fps. Accurate 4350 gives the best case fill at 100 %, and 84 of the 84 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 180.0 gr projectile in 0.323" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, 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, Hodgdon LEVERevolution rank at the top here: for 8 x 57 IRS with the .323 | 180gr | Barnes TSX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, Alliant Reloder-16, Hodgdon H380 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.