Load Specifications
Load data in caliber 8 x 57 IS with .323 | 139gr | Prvi Partizan SP bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Winchester 748 and Hodgdon H322.
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>> | 94% | 50,343 psi | 89% | 2946 fps | 100% |
| Accurate 2460 | <<locked>> | 90% | 48,791 psi | 86% | 2946 fps | 98.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 48,588 psi | 86% | 2979 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 49,472 psi | 87% | 2999 fps | 98.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 45,049 psi | 80% | 2943 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 86% | 49,255 psi | 87% | 2854 fps | 99.6% |
| Accurate LT-32 | <<locked>> | 86% | 49,690 psi | 88% | 2867 fps | 98.6% |
| ADI AR 2207 | <<locked>> | 84% | 49,617 psi | 88% | 2900 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 47,761 psi | 84% | 2956 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 94% | 49,124 psi | 87% | 2956 fps | 96.9% |
| Alliant AR-Comp | <<locked>> | 96% | 49,980 psi | 88% | 3025 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 49,647 psi | 88% | 3058 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 90% | 50,647 psi | 90% | 2969 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 84% | 51,169 psi | 90% | 2913 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,126 psi | 90% | 2897 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 92% | 48,907 psi | 86% | 2907 fps | 97.5% |
| Hodgdon BL-C2 | <<locked>> | 96% | 50,154 psi | 89% | 3031 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 90% | 49,777 psi | 88% | 2992 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 90% | 50,749 psi | 90% | 3005 fps | 99.2% |
| Hodgdon H4198 | <<locked>> | 82% | 48,153 psi | 85% | 2854 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 96% | 49,545 psi | 88% | 2999 fps | 96.3% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 50,995 psi | 90% | 3071 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,127 psi | 59% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 48,370 psi | 86% | 2953 fps | 95.9% |
| IMR 3031 | <<locked>> | 98% | 50,604 psi | 89% | 3064 fps | 100% |
| IMR 4198 | <<locked>> | 88% | 48,892 psi | 86% | 2897 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 50,850 psi | 90% | 3051 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 94% | 49,124 psi | 87% | 2956 fps | 96.9% |
| Lovex D073.4 | <<locked>> | 84% | 48,965 psi | 87% | 2959 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 90% | 48,747 psi | 86% | 2946 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 98% | 50,372 psi | 89% | 3022 fps | 98.7% |
| Lovex S060 | <<locked>> | 96% | 50,879 psi | 90% | 2930 fps | 95.9% |
| Lovex S062ᴾ | <<locked>> | 100% | 48,356 psi | 85% | 2956 fps | 96.9% |
| Norma 200 | <<locked>> | 86% | 50,836 psi | 90% | 2946 fps | 100% |
| Norma 201 | <<locked>> | 96% | 48,240 psi | 85% | 2940 fps | 96.8% |
| Norma 202 | <<locked>> | 96% | 48,211 psi | 85% | 2963 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,996 psi | 58% | 1877 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 49,255 psi | 87% | 2959 fps | 98.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 43,540 psi | 77% | 2966 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 94% | 49,269 psi | 87% | 2949 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 98% | 48,370 psi | 86% | 2933 fps | 96.8% |
| Shooters World AR Plus | <<locked>> | 84% | 48,965 psi | 87% | 2959 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 98% | 50,372 psi | 89% | 3022 fps | 98.7% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 48,356 psi | 85% | 2956 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 49,705 psi | 88% | 2920 fps | 96.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 50,821 psi | 90% | 2657 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 48,602 psi | 86% | 2966 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 48,327 psi | 85% | 2927 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 51,024 psi | 90% | 3009 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 51,068 psi | 90% | 2917 fps | 99.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 46,760 psi | 83% | 2851 fps | 99.3% |
| Somchem S321 | <<locked>> | 92% | 50,169 psi | 89% | 2995 fps | 97.5% |
| Somchem S335 | <<locked>> | 96% | 49,792 psi | 88% | 2917 fps | 99.5% |
| Vihtavuori N120 | <<locked>> | 84% | 49,574 psi | 88% | 2848 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 50,937 psi | 90% | 2910 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 50,444 psi | 89% | 2917 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 49,124 psi | 87% | 2976 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 48,689 psi | 86% | 2943 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 94% | 49,676 psi | 88% | 2956 fps | 97.1% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 50,183 psi | 89% | 2982 fps | 99% |
| Winchester 748 | <<locked>> | 96% | 51,039 psi | 90% | 3051 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 98% | 50,270 psi | 89% | 3015 fps | 96.4% |
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% | 32,285 psi | 57% | 2582 fps | 97.7% |
| Accurate 2460 | <<locked>> | 80% | 34,780 psi | 61% | 2661 fps | 95.4% |
| Accurate 2495 | <<locked>> | 80% | 24,860 psi | 44% | 2434 fps | 95% |
| Accurate 2520 | <<locked>> | 86% | 37,391 psi | 66% | 2759 fps | 95.9% |
| Accurate 4064 | <<locked>> | 90% | 32,648 psi | 58% | 2671 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 41,017 psi | 73% | 2703 fps | 98.6% |
| Accurate LT-32 | <<locked>> | 80% | 41,379 psi | 73% | 2710 fps | 96.9% |
| ADI AR 2207 | <<locked>> | 80% | 43,990 psi | 78% | 2808 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 39,001 psi | 69% | 2782 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 90% | 43,381 psi | 77% | 2844 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 29,602 psi | 52% | 2598 fps | 99.1% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 46,470 psi | 82% | 2999 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,231 psi | 66% | 2713 fps | 99.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 45,063 psi | 80% | 2812 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,465 psi | 70% | 2684 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 40,959 psi | 72% | 2749 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 90% | 40,901 psi | 72% | 2854 fps | 95.6% |
| Hodgdon H322 | 44.3 gr | 80% | 35,636 psi | 63% | 2703 fps | 97.1% |
| Hodgdon H335 | <<locked>> | 80% | 36,100 psi | 64% | 2713 fps | 96.1% |
| Hodgdon H4198 | <<locked>> | 80% | 45,179 psi | 80% | 2802 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 94% | 46,543 psi | 82% | 2943 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 44,744 psi | 79% | 2953 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,323 psi | 43% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 45,455 psi | 80% | 2897 fps | 95.1% |
| IMR 3031 | 42.9 gr | 80% | 28,384 psi | 50% | 2562 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 38,493 psi | 68% | 2703 fps | 99.9% |
| IMR 4895 | <<locked>> | 98% | 47,413 psi | 84% | 2989 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 90% | 43,381 psi | 77% | 2844 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 42,395 psi | 75% | 2835 fps | 97% |
| Lovex D073.5 | <<locked>> | 84% | 39,711 psi | 70% | 2769 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 88% | 35,766 psi | 63% | 2733 fps | 95.3% |
| Lovex S060 | <<locked>> | 94% | 47,877 psi | 85% | 2877 fps | 95.2% |
| Lovex S062 | <<locked>> | 96% | 42,888 psi | 76% | 2851 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 42,032 psi | 74% | 2795 fps | 100% |
| Norma 201 | <<locked>> | 92% | 42,496 psi | 75% | 2828 fps | 95.4% |
| Norma 202 | <<locked>> | 84% | 32,764 psi | 58% | 2631 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,352 psi | 43% | 1680 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 38,029 psi | 67% | 2733 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 40,756 psi | 72% | 2897 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 82% | 34,505 psi | 61% | 2635 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 94% | 42,873 psi | 76% | 2828 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 42,395 psi | 75% | 2835 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 88% | 35,766 psi | 63% | 2733 fps | 95.3% |
| Shooters World Precision | <<locked>> | 96% | 42,888 psi | 76% | 2851 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 46,383 psi | 82% | 2861 fps | 95.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 45,759 psi | 81% | 2585 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,552 psi | 70% | 2785 fps | 97.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,478 psi | 66% | 2717 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 47,935 psi | 85% | 2953 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 33,127 psi | 59% | 2552 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 30,269 psi | 54% | 2500 fps | 95.2% |
| Somchem S321 | <<locked>> | 86% | 40,857 psi | 72% | 2815 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 30,487 psi | 54% | 2503 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 44,063 psi | 78% | 2762 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 35,331 psi | 62% | 2618 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 80% | 30,792 psi | 54% | 2516 fps | 97.1% |
| Vihtavuori N135 | <<locked>> | 80% | 25,860 psi | 46% | 2454 fps | 95.3% |
| Vihtavuori N140 | <<locked>> | 86% | 33,112 psi | 59% | 2621 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 90% | 43,381 psi | 77% | 2841 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 88% | 34,026 psi | 60% | 2654 fps | 95.2% |
| Winchester 748 | 51.1 gr | 88% | 39,131 psi | 69% | 2815 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 96% | 46,934 psi | 83% | 2956 fps | 95.7% |
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 88 powders for 8 x 57 IS loaded with the .323 | 139gr | Prvi Partizan SP. Hodgdon LEVERevolution delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,071 fps. Accurate 2495 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. Accurate 2495, Accurate 4064, ADI AR 2208 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, Winchester 748, Hodgdon H322 rank at the top here: for 8 x 57 IS with the .323 | 139gr | Prvi Partizan SP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2200, Accurate 2230, ADI AR 2208 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.