Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 170gr | Hasler ARIETE bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, ReloadSwiss RS 60 and Hodgdon BL-C2.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 41,814 psi | 87% | 2500 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 42,482 psi | 89% | 2539 fps | 98.8% |
| Accurate 2495 | <<locked>> | 96% | 42,235 psi | 88% | 2572 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 43,120 psi | 90% | 2589 fps | 98.6% |
| Accurate 4064 | <<locked>> | 98% | 41,989 psi | 88% | 2595 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 42,076 psi | 88% | 2549 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 40,843 psi | 85% | 2507 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 90% | 41,408 psi | 87% | 2569 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 41,060 psi | 86% | 2589 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 42,525 psi | 89% | 2592 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 84% | 42,366 psi | 89% | 2520 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 42,264 psi | 88% | 2454 fps | 99.7% |
| Bofors RP3 | <<locked>> | 98% | 41,843 psi | 87% | 2592 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 40,959 psi | 86% | 2464 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 90% | 40,756 psi | 85% | 2566 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 84% | 40,901 psi | 85% | 2526 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 84% | 41,669 psi | 87% | 2546 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 42,090 psi | 88% | 2608 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,098 psi | 69% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 42,714 psi | 89% | 2556 fps | 96% |
| IMR 3031 | <<locked>> | 92% | 42,032 psi | 88% | 2608 fps | 99.9% |
| IMR 4198 | <<locked>> | 82% | 41,278 psi | 86% | 2454 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 40,843 psi | 85% | 2507 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 86% | 42,438 psi | 89% | 2539 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 92% | 40,973 psi | 86% | 2562 fps | 98.2% |
| Lovex S062 | <<locked>> | 96% | 42,801 psi | 89% | 2562 fps | 97% |
| Norma 201 | <<locked>> | 92% | 42,482 psi | 89% | 2539 fps | 96.9% |
| Norma 202 | <<locked>> | 92% | 42,438 psi | 89% | 2559 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,054 psi | 69% | 1644 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 40,756 psi | 85% | 2507 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 40,683 psi | 85% | 2621 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 88% | 41,075 psi | 86% | 2500 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 94% | 42,699 psi | 89% | 2536 fps | 96.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,495 psi | 87% | 2575 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 92% | 40,973 psi | 86% | 2562 fps | 98.2% |
| Shooters World Precision | <<locked>> | 96% | 42,801 psi | 89% | 2562 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 40,509 psi | 85% | 2461 fps | 95.8% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 42,482 psi | 89% | 2552 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 42,989 psi | 90% | 2526 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 42,598 psi | 89% | 2474 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 41,582 psi | 87% | 2474 fps | 99.4% |
| Somchem S321 | <<locked>> | 86% | 40,886 psi | 85% | 2533 fps | 96.8% |
| Somchem S335 | <<locked>> | 90% | 41,336 psi | 86% | 2474 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 43,091 psi | 90% | 2589 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 86% | 42,873 psi | 90% | 2477 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 42,308 psi | 88% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 40,959 psi | 86% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 42,786 psi | 89% | 2543 fps | 99.2% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,437 psi | 87% | 2533 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 88% | 40,886 psi | 85% | 2503 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 94% | 41,176 psi | 86% | 2530 fps | 98.6% |
| Winchester 748 | <<locked>> | 90% | 41,843 psi | 87% | 2589 fps | 97.6% |
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% | 32,169 psi | 67% | 2310 fps | 98.9% |
| Accurate 2460 | <<locked>> | 80% | 34,635 psi | 72% | 2385 fps | 97% |
| Accurate 2495 | <<locked>> | 80% | 24,395 psi | 51% | 2182 fps | 96.7% |
| Accurate 2520 | <<locked>> | 82% | 32,489 psi | 68% | 2375 fps | 95.9% |
| Accurate 4064 | <<locked>> | 86% | 28,224 psi | 59% | 2297 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 39,276 psi | 82% | 2497 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 38,232 psi | 80% | 2454 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 29,718 psi | 62% | 2333 fps | 99.9% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 38,276 psi | 80% | 2533 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,420 psi | 78% | 2493 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,130 psi | 78% | 2421 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,711 psi | 83% | 2408 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 39,001 psi | 81% | 2539 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 36,245 psi | 76% | 2369 fps | 95.7% |
| Hodgdon BL-C2 | 44.6 gr | 86% | 35,621 psi | 74% | 2461 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 35,882 psi | 75% | 2428 fps | 98.5% |
| Hodgdon H335 | <<locked>> | 80% | 36,216 psi | 76% | 2441 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,479 psi | 82% | 2556 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,323 psi | 51% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 40,001 psi | 84% | 2503 fps | 95.2% |
| IMR 3031 | 37.6 gr | 80% | 28,239 psi | 59% | 2303 fps | 96.9% |
| IMR 4198 | <<locked>> | 80% | 38,769 psi | 81% | 2411 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 38,232 psi | 80% | 2454 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 80% | 34,447 psi | 72% | 2382 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 84% | 31,009 psi | 65% | 2352 fps | 95.2% |
| Lovex S062 | <<locked>> | 92% | 37,681 psi | 79% | 2464 fps | 95.6% |
| Norma 201 | <<locked>> | 88% | 37,420 psi | 78% | 2441 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 28,776 psi | 60% | 2264 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,410 psi | 51% | 1470 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,665 psi | 75% | 2402 fps | 96.4% |
| ReloadSwiss RS 60 | 48 gr | 94% | 35,766 psi | 75% | 2507 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 32,140 psi | 67% | 2310 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 90% | 37,608 psi | 79% | 2438 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 98% | 38,943 psi | 81% | 2530 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,009 psi | 65% | 2352 fps | 95.2% |
| Shooters World Precision | <<locked>> | 92% | 37,681 psi | 79% | 2464 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,869 psi | 79% | 2411 fps | 95% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,740 psi | 83% | 2500 fps | 98.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,869 psi | 79% | 2434 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,038 psi | 65% | 2241 fps | 95.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 26,614 psi | 56% | 2149 fps | 95.3% |
| Somchem S321 | <<locked>> | 82% | 35,607 psi | 74% | 2425 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 30,342 psi | 63% | 2244 fps | 96.7% |
| Somchem S355 | <<locked>> | 98% | 40,306 psi | 84% | 2536 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 35,476 psi | 74% | 2339 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 30,893 psi | 65% | 2254 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 80% | 25,802 psi | 54% | 2205 fps | 97.1% |
| Vihtavuori N140 | <<locked>> | 82% | 29,138 psi | 61% | 2257 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 96% | 36,376 psi | 76% | 2434 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 86% | 38,203 psi | 80% | 2451 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 84% | 29,791 psi | 62% | 2287 fps | 95.3% |
| Winchester 748 | <<locked>> | 84% | 34,345 psi | 72% | 2428 fps | 95.3% |
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 52 powders for 8 x 57 IRS loaded with the .323 | 170gr | Hasler ARIETE. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,621 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,621 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 170.0 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, Rottweil R 903 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. IMR 3031, ReloadSwiss RS 60, Hodgdon BL-C2 rank at the top here: for 8 x 57 IRS with the .323 | 170gr | Hasler ARIETE 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.