Load Specifications
Load data in caliber 8 x 57 IRS with .323 | 160gr | Hasler ARIETE bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Accurate 4064.
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>> | 88% | 42,960 psi | 90% | 2625 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 40,973 psi | 86% | 2615 fps | 98.4% |
| Accurate 2495 | <<locked>> | 94% | 40,785 psi | 85% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 41,481 psi | 87% | 2664 fps | 98.2% |
| Accurate 4064 | <<locked>> | 96% | 40,988 psi | 86% | 2677 fps | 99% |
| ADI AR 2219 | <<locked>> | 82% | 43,163 psi | 90% | 2674 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 42,061 psi | 88% | 2635 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 90% | 42,656 psi | 89% | 2700 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 42,221 psi | 88% | 2720 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 41,089 psi | 86% | 2671 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 82% | 40,683 psi | 85% | 2595 fps | 100% |
| Bofors RP3 | <<locked>> | 96% | 40,466 psi | 85% | 2667 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 41,901 psi | 88% | 2589 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 90% | 42,264 psi | 88% | 2697 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 84% | 42,076 psi | 88% | 2654 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 84% | 42,873 psi | 90% | 2674 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 90% | 42,322 psi | 88% | 2674 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 43,294 psi | 90% | 2740 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,272 psi | 70% | 1693 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 43,120 psi | 90% | 2736 fps | 99.9% |
| IMR 4198 | <<locked>> | 82% | 42,206 psi | 88% | 2579 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 42,061 psi | 88% | 2635 fps | 96.5% |
| Lovex D073.5 | <<locked>> | 84% | 40,799 psi | 85% | 2612 fps | 97.3% |
| Lovex D073.6 | <<locked>> | 92% | 42,380 psi | 89% | 2690 fps | 98.4% |
| Lovex S062 | <<locked>> | 94% | 41,568 psi | 87% | 2641 fps | 96.6% |
| Norma 201 | <<locked>> | 90% | 41,031 psi | 86% | 2618 fps | 96.4% |
| Norma 202 | <<locked>> | 90% | 40,915 psi | 85% | 2635 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,185 psi | 69% | 1732 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 41,640 psi | 87% | 2628 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 41,887 psi | 88% | 2756 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 88% | 42,221 psi | 88% | 2628 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 92% | 41,162 psi | 86% | 2612 fps | 96.4% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 43,091 psi | 90% | 2710 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 92% | 42,380 psi | 89% | 2690 fps | 98.4% |
| Shooters World Precision | <<locked>> | 94% | 41,568 psi | 87% | 2641 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 41,524 psi | 87% | 2585 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 41,510 psi | 87% | 2608 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 41,147 psi | 86% | 2556 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 42,583 psi | 89% | 2592 fps | 99.4% |
| Somchem S321 | <<locked>> | 86% | 42,061 psi | 88% | 2657 fps | 96.9% |
| Somchem S335 | <<locked>> | 90% | 42,554 psi | 89% | 2598 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 41,263 psi | 86% | 2552 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 40,959 psi | 86% | 2562 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 94% | 42,105 psi | 88% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 41,336 psi | 86% | 2621 fps | 98.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,931 psi | 90% | 2661 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 88% | 42,105 psi | 88% | 2631 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 94% | 42,598 psi | 89% | 2661 fps | 98.8% |
| Winchester 748 | <<locked>> | 90% | 43,178 psi | 90% | 2720 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 92% | 42,496 psi | 89% | 2684 fps | 95.9% |
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% | 33,011 psi | 69% | 2425 fps | 98.9% |
| Accurate 2460 | <<locked>> | 80% | 35,650 psi | 74% | 2507 fps | 97.1% |
| Accurate 2495 | <<locked>> | 80% | 25,266 psi | 53% | 2293 fps | 96.8% |
| Accurate 2520 | <<locked>> | 80% | 31,038 psi | 65% | 2434 fps | 95% |
| Accurate 4064 | 44.1 gr | 86% | 29,240 psi | 61% | 2415 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 40,234 psi | 84% | 2621 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 36,999 psi | 77% | 2530 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 30,429 psi | 64% | 2448 fps | 99.9% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 39,334 psi | 82% | 2657 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,551 psi | 81% | 2618 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,130 psi | 80% | 2546 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 37,666 psi | 79% | 2612 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 82% | 37,159 psi | 78% | 2490 fps | 95.8% |
| Hodgdon BL-C2 | <<locked>> | 86% | 36,840 psi | 77% | 2585 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 36,767 psi | 77% | 2549 fps | 98.5% |
| Hodgdon H335 | <<locked>> | 80% | 37,159 psi | 78% | 2559 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 88% | 39,784 psi | 83% | 2625 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 40,480 psi | 85% | 2680 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,366 psi | 51% | 1509 fps | 100% |
| IMR 3031 | 40.6 gr | 80% | 29,153 psi | 61% | 2421 fps | 97.1% |
| IMR 4198 | <<locked>> | 80% | 39,552 psi | 83% | 2530 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 36,999 psi | 77% | 2530 fps | 95% |
| Lovex D073.5 | <<locked>> | 80% | 35,331 psi | 74% | 2497 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 84% | 32,039 psi | 67% | 2474 fps | 95.4% |
| Lovex S062 | <<locked>> | 90% | 36,492 psi | 76% | 2536 fps | 95% |
| Norma 201 | <<locked>> | 88% | 38,551 psi | 81% | 2566 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 29,617 psi | 62% | 2379 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,410 psi | 51% | 1545 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,579 psi | 76% | 2520 fps | 96.5% |
| ReloadSwiss RS 60 | 51.7 gr | 94% | 36,680 psi | 77% | 2631 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 32,996 psi | 69% | 2428 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 90% | 38,682 psi | 81% | 2562 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 98% | 40,074 psi | 84% | 2651 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 32,039 psi | 67% | 2474 fps | 95.4% |
| Shooters World Precision | <<locked>> | 90% | 36,492 psi | 76% | 2536 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,798 psi | 81% | 2530 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,899 psi | 81% | 2556 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,850 psi | 67% | 2356 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 27,398 psi | 57% | 2260 fps | 95.4% |
| Somchem S321 | <<locked>> | 82% | 36,738 psi | 77% | 2549 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 31,169 psi | 65% | 2359 fps | 96.8% |
| Vihtavuori N130 | <<locked>> | 80% | 36,361 psi | 76% | 2457 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,734 psi | 66% | 2369 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 80% | 26,600 psi | 56% | 2316 fps | 97.2% |
| Vihtavuori N140 | <<locked>> | 82% | 29,762 psi | 62% | 2365 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 94% | 35,215 psi | 74% | 2510 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 84% | 36,608 psi | 76% | 2520 fps | 95% |
| Vihtavuori N540 | <<locked>> | 84% | 30,545 psi | 64% | 2398 fps | 95.4% |
| Winchester 748 | <<locked>> | 84% | 35,215 psi | 74% | 2549 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 39,711 psi | 83% | 2628 fps | 95.1% |
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 75 powders for 8 x 57 IRS loaded with the .323 | 160gr | Hasler ARIETE. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,756 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,756 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.323" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon TrailBoss, ReloadSwiss RS 14 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, IMR 3031, Accurate 4064 rank at the top here: for 8 x 57 IRS with the .323 | 160gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2208, Alliant Power Pro 2000-MR, Alliant Reloder-15 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.