Load Specifications
Load data in caliber 8 x 57 IS with .323 | 170gr | Hornady SST bullet and 79 powders. The key underlying parameters are shown in the table above.
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>> | 90% | 49,516 psi | 88% | 2641 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 50,328 psi | 89% | 2717 fps | 96.9% |
| Accurate 2230 | <<locked>> | 82% | 50,676 psi | 90% | 2723 fps | 97.4% |
| Accurate 2460 | <<locked>> | 86% | 48,066 psi | 85% | 2657 fps | 99.7% |
| Accurate 2495 | <<locked>> | 96% | 49,008 psi | 87% | 2694 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 48,820 psi | 86% | 2707 fps | 99.6% |
| Accurate 4064 | <<locked>> | 98% | 48,530 psi | 86% | 2720 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 84% | 50,734 psi | 90% | 2598 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 51,184 psi | 90% | 2618 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 92% | 48,776 psi | 86% | 2703 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 98% | 49,530 psi | 88% | 2694 fps | 96.9% |
| ADI AR 2219 | <<locked>> | 84% | 50,140 psi | 89% | 2707 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 48,283 psi | 85% | 2671 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 92% | 49,951 psi | 88% | 2717 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 49,037 psi | 87% | 2762 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 47,703 psi | 84% | 2772 fps | 96% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 51,126 psi | 90% | 2762 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 49,792 psi | 88% | 2657 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 49,168 psi | 87% | 2730 fps | 97.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 45,614 psi | 81% | 2743 fps | 97.1% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 49,501 psi | 88% | 2595 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 47,848 psi | 85% | 2703 fps | 96.1% |
| Bofors RP3ᴾ | <<locked>> | 100% | 51,024 psi | 90% | 2772 fps | 98.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 50,879 psi | 90% | 2667 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 92% | 49,371 psi | 87% | 2740 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 88% | 47,630 psi | 84% | 2762 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 86% | 48,892 psi | 86% | 2687 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 49,676 psi | 88% | 2707 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 98% | 49,777 psi | 88% | 2723 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 92% | 49,081 psi | 87% | 2717 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 50,154 psi | 89% | 2785 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,750 psi | 60% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 50,662 psi | 90% | 2723 fps | 98.3% |
| IMR 3031 | <<locked>> | 94% | 50,372 psi | 89% | 2762 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 49,081 psi | 87% | 2680 fps | 97.1% |
| IMR 4198 | <<locked>> | 86% | 50,705 psi | 90% | 2625 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 50,372 psi | 89% | 2766 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 90% | 48,283 psi | 85% | 2671 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 88% | 51,140 psi | 90% | 2707 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 94% | 49,966 psi | 88% | 2733 fps | 99.7% |
| Lovex S060 | <<locked>> | 92% | 49,559 psi | 88% | 2641 fps | 97.6% |
| Lovex S062 | <<locked>> | 98% | 51,140 psi | 90% | 2730 fps | 99% |
| Norma 200 | <<locked>> | 82% | 49,995 psi | 88% | 2635 fps | 100% |
| Norma 201 | <<locked>> | 94% | 50,459 psi | 89% | 2703 fps | 98.9% |
| Norma 202 | <<locked>> | 94% | 50,633 psi | 90% | 2720 fps | 99.9% |
| Norma 203B | <<locked>> | 96% | 48,269 psi | 85% | 2720 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 96% | 48,544 psi | 86% | 2740 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 92% | 50,778 psi | 90% | 2743 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 49,792 psi | 88% | 2671 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,069 psi | 60% | 1690 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 48,153 psi | 85% | 2664 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 48,095 psi | 85% | 2782 fps | 96.8% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 48,733 psi | 86% | 2818 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 90% | 48,675 psi | 86% | 2657 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 96% | 50,952 psi | 90% | 2703 fps | 98.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 47,427 psi | 84% | 2707 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 49,966 psi | 88% | 2733 fps | 99.7% |
| Shooters World Precision | <<locked>> | 98% | 51,140 psi | 90% | 2730 fps | 99% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 48,037 psi | 85% | 2625 fps | 98.1% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 50,589 psi | 89% | 2713 fps | 99.9% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 49,763 psi | 88% | 2766 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 50,633 psi | 90% | 2674 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 50,082 psi | 89% | 2723 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 50,038 psi | 88% | 2621 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 49,066 psi | 87% | 2618 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 49,153 psi | 87% | 2703 fps | 98.9% |
| Somchem S335 | <<locked>> | 92% | 48,965 psi | 87% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 48,950 psi | 87% | 2690 fps | 97.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 48,515 psi | 86% | 2710 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 88% | 50,024 psi | 88% | 2608 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 49,748 psi | 88% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 49,139 psi | 87% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 51,010 psi | 90% | 2700 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 46,920 psi | 83% | 2651 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 90% | 48,544 psi | 86% | 2667 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 96% | 49,501 psi | 88% | 2694 fps | 99.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 43,192 psi | 76% | 2582 fps | 96.4% |
| Winchester 748 | <<locked>> | 92% | 50,241 psi | 89% | 2759 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 94% | 49,429 psi | 87% | 2730 fps | 98.2% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 36,376 psi | 64% | 2418 fps | 99.7% |
| Accurate 2200 | <<locked>> | 80% | 47,065 psi | 83% | 2657 fps | 96.2% |
| Accurate 2230 | <<locked>> | 80% | 47,021 psi | 83% | 2664 fps | 96.6% |
| Accurate 2460 | <<locked>> | 80% | 39,088 psi | 69% | 2497 fps | 98.6% |
| Accurate 2495 | <<locked>> | 80% | 28,776 psi | 51% | 2306 fps | 98.7% |
| Accurate 2520 | <<locked>> | 80% | 34,519 psi | 61% | 2441 fps | 97.1% |
| Accurate 4064 | <<locked>> | 80% | 27,253 psi | 48% | 2277 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 45,034 psi | 80% | 2510 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 80% | 45,411 psi | 80% | 2523 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 40,364 psi | 71% | 2549 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 94% | 43,990 psi | 78% | 2595 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 43,714 psi | 77% | 2602 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,215 psi | 62% | 2415 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 33,591 psi | 59% | 2441 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,176 psi | 71% | 2595 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 44,643 psi | 79% | 2717 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 37,173 psi | 66% | 2510 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,611 psi | 74% | 2526 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 43,366 psi | 77% | 2628 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 39,798 psi | 70% | 2621 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 43,439 psi | 77% | 2500 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 44,875 psi | 79% | 2648 fps | 95.3% |
| Bofors RP3 | <<locked>> | 90% | 36,521 psi | 65% | 2510 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,608 psi | 66% | 2425 fps | 96.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,895 psi | 58% | 2418 fps | 95.2% |
| Hodgdon CFE223 | <<locked>> | 84% | 41,539 psi | 73% | 2644 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 40,016 psi | 71% | 2533 fps | 99.5% |
| Hodgdon H335 | <<locked>> | 80% | 40,480 psi | 72% | 2546 fps | 99% |
| Hodgdon H380 | <<locked>> | 96% | 46,804 psi | 83% | 2674 fps | 95% |
| Hodgdon H4895 | <<locked>> | 84% | 37,971 psi | 67% | 2507 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 36,245 psi | 64% | 2513 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,092 psi | 44% | 1473 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 39,392 psi | 70% | 2520 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 31,966 psi | 57% | 2418 fps | 98.7% |
| IMR 4064 | <<locked>> | 92% | 43,250 psi | 76% | 2579 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 42,569 psi | 75% | 2500 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 39,059 psi | 69% | 2559 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 35,215 psi | 62% | 2415 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 80% | 38,957 psi | 69% | 2497 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 80% | 31,053 psi | 55% | 2369 fps | 95.8% |
| Lovex S060 | <<locked>> | 84% | 39,001 psi | 69% | 2451 fps | 95% |
| Lovex S062 | <<locked>> | 86% | 35,447 psi | 63% | 2438 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 46,804 psi | 83% | 2589 fps | 100% |
| Norma 201 | <<locked>> | 82% | 34,983 psi | 62% | 2411 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 32,648 psi | 58% | 2379 fps | 97.2% |
| Norma 203B | <<locked>> | 90% | 39,798 psi | 70% | 2562 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 92% | 42,380 psi | 75% | 2628 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 41,539 psi | 73% | 2579 fps | 95.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 40,988 psi | 72% | 2513 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,266 psi | 45% | 1509 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,740 psi | 70% | 2510 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 42,279 psi | 75% | 2671 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 32,909 psi | 58% | 2467 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 36,172 psi | 64% | 2421 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 84% | 35,317 psi | 62% | 2411 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 92% | 36,448 psi | 64% | 2500 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,053 psi | 55% | 2369 fps | 95.8% |
| Shooters World Precision | <<locked>> | 86% | 35,447 psi | 63% | 2438 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 42,032 psi | 74% | 2520 fps | 96.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 44,179 psi | 78% | 2605 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 41,031 psi | 73% | 2605 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 42,221 psi | 75% | 2536 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 41,481 psi | 73% | 2569 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,708 psi | 61% | 2346 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,181 psi | 50% | 2211 fps | 96.6% |
| Somchem S321 | <<locked>> | 80% | 37,391 psi | 66% | 2487 fps | 96.4% |
| Somchem S335 | <<locked>> | 80% | 33,953 psi | 60% | 2349 fps | 98.3% |
| Somchem S341 | <<locked>> | 86% | 39,871 psi | 70% | 2526 fps | 95.1% |
| Somchem S355 | <<locked>> | 92% | 37,840 psi | 67% | 2513 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 39,494 psi | 70% | 2438 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,650 psi | 61% | 2359 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 80% | 29,660 psi | 52% | 2320 fps | 98.8% |
| Vihtavuori N140 | <<locked>> | 80% | 30,748 psi | 54% | 2316 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 90% | 33,953 psi | 60% | 2405 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 35,056 psi | 62% | 2408 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 29,573 psi | 52% | 2300 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 40,509 psi | 72% | 2530 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 33,692 psi | 60% | 2438 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 37,942 psi | 67% | 2520 fps | 95.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 96 powders for 8 x 57 IS loaded with the .323 | 170gr | Hornady SST. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,818 fps. Accurate 4350 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.323" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, Alliant Reloder-16 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. As outliers, Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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.