Load Specifications
Load data in caliber 8 x 57 PCC with .323 | 220gr | Woodleigh PP SN bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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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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 2495 | <<locked>> | 82% | 57,624 psi | 90% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,013 psi | 86% | 2615 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,884 psi | 89% | 2710 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,563 psi | 86% | 2592 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,390 psi | 87% | 2703 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,317 psi | 87% | 2799 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 54,331 psi | 85% | 2621 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,057 psi | 88% | 2749 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 2805 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,072 psi | 58% | 2480 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,580 psi | 90% | 2792 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,217 psi | 88% | 2746 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,217 psi | 88% | 2746 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,201 psi | 87% | 2644 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,521 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,072 psi | 88% | 2753 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,392 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,448 psi | 87% | 2736 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2799 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 2723 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2664 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,722 psi | 84% | 2808 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,837 psi | 81% | 2723 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 56,275 psi | 88% | 2664 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2799 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 55,463 psi | 87% | 2654 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,122 psi | 72% | 2608 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 84% | 56,536 psi | 89% | 2684 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,464 psi | 90% | 2753 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 56,971 psi | 89% | 2713 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 98% | 57,624 psi | 90% | 2746 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,347 psi | 88% | 2730 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,434 psi | 88% | 2680 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,740 psi | 90% | 2707 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,600 psi | 71% | 2707 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,722 psi | 84% | 2736 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 57% | 1640 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,232 psi | 90% | 2651 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,246 psi | 88% | 2641 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 56,333 psi | 88% | 2687 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,956 psi | 89% | 2677 fps | 99.7% |
| IMR 4831 | <<locked>> | 92% | 55,825 psi | 87% | 2697 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,971 psi | 89% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,361 psi | 87% | 2677 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,926 psi | 86% | 2776 fps | 98% |
| Lovex S062 | <<locked>> | 84% | 57,696 psi | 90% | 2648 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,101 psi | 89% | 2674 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,201 psi | 87% | 2671 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,369 psi | 74% | 2572 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 54,868 psi | 86% | 2654 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,363 psi | 90% | 2743 fps | 99% |
| Norma MRP | <<locked>> | 98% | 56,434 psi | 88% | 2825 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 57,667 psi | 90% | 2736 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,492 psi | 87% | 2677 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2799 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 92% | 56,391 psi | 88% | 2743 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,429 psi | 77% | 2674 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,188 psi | 88% | 2667 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,043 psi | 89% | 2762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,332 psi | 87% | 2726 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,261 psi | 90% | 2805 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,513 psi | 71% | 2703 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 55,941 psi | 88% | 2608 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,362 psi | 88% | 2657 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,215 psi | 85% | 2667 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,911 psi | 86% | 2726 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 55,463 psi | 87% | 2654 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,101 psi | 89% | 2674 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,696 psi | 90% | 2648 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,201 psi | 87% | 2671 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,143 psi | 85% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,087 psi | 89% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,913 psi | 89% | 2635 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,447 psi | 85% | 2720 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 56,231 psi | 88% | 2654 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,753 psi | 87% | 2661 fps | 97.3% |
| Somchem S365 | <<locked>> | 94% | 57,116 psi | 90% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,434 psi | 87% | 2700 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 82% | 56,565 psi | 89% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,623 psi | 89% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,479 psi | 90% | 2628 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,043 psi | 88% | 2680 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 2677 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 54,737 psi | 86% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,187 psi | 86% | 2687 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,246 psi | 88% | 2749 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,623 psi | 89% | 2815 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,370 psi | 76% | 2674 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,550 psi | 87% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,711 psi | 90% | 2759 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,052 psi | 77% | 2792 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,419 psi | 87% | 2697 fps | 98.8% |
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 2495 | <<locked>> | 80% | 54,027 psi | 85% | 2536 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,474 psi | 81% | 2559 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 31,183 psi | 49% | 2251 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,227 psi | 80% | 2546 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,566 psi | 62% | 2444 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 48,051 psi | 75% | 2680 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,167 psi | 75% | 2530 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,553 psi | 64% | 2480 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 44,121 psi | 69% | 2575 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 34,708 psi | 54% | 2425 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,664 psi | 84% | 2740 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,276 psi | 60% | 2428 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,276 psi | 60% | 2428 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,892 psi | 77% | 2552 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,141 psi | 82% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,261 psi | 60% | 2451 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,439 psi | 68% | 2566 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,379 psi | 63% | 2477 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,014 psi | 60% | 2467 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,108 psi | 44% | 2228 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,849 psi | 47% | 2287 fps | 95.2% |
| Alliant Reloder-26 | 64.9 gr | 80% | 30,110 psi | 47% | 2336 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 40,161 psi | 63% | 2513 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,298 psi | 77% | 2566 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,014 psi | 60% | 2467 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,134 psi | 68% | 2451 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 98% | 43,178 psi | 68% | 2552 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,603 psi | 78% | 2579 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,263 psi | 65% | 2487 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 44,135 psi | 69% | 2503 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 47,065 psi | 74% | 2582 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,296 psi | 73% | 2566 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,839 psi | 56% | 2349 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,998 psi | 85% | 2657 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,550 psi | 59% | 2526 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 40,147 psi | 63% | 2500 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 43% | 1463 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,633 psi | 79% | 2559 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,895 psi | 83% | 2592 fps | 99.5% |
| IMR 4350 | <<locked>> | 80% | 38,740 psi | 61% | 2385 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,512 psi | 70% | 2477 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 37,913 psi | 59% | 2398 fps | 99.1% |
| IMR 4895 | <<locked>> | 80% | 53,519 psi | 84% | 2644 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,992 psi | 72% | 2526 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 44,918 psi | 70% | 2605 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 50,894 psi | 80% | 2552 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,061 psi | 66% | 2431 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,393 psi | 63% | 2418 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 30,487 psi | 48% | 2234 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,503 psi | 81% | 2605 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,973 psi | 64% | 2467 fps | 95.8% |
| Norma MRP | 66.1 gr | 84% | 34,693 psi | 54% | 2421 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,117 psi | 61% | 2434 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 51,895 psi | 81% | 2628 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,713 psi | 65% | 2556 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,840 psi | 59% | 2425 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,173 psi | 58% | 2444 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 44% | 1499 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,472 psi | 78% | 2566 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,108 psi | 72% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,117 psi | 61% | 2457 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,869 psi | 59% | 2470 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,461 psi | 54% | 2448 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,750 psi | 83% | 2566 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,456 psi | 73% | 2516 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,163 psi | 66% | 2461 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 39,494 psi | 62% | 2457 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,134 psi | 68% | 2451 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,061 psi | 66% | 2431 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 50,894 psi | 80% | 2552 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,393 psi | 63% | 2418 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,543 psi | 75% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,500 psi | 74% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,234 psi | 65% | 2382 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,131 psi | 61% | 2454 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,543 psi | 73% | 2510 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,832 psi | 72% | 2503 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,578 psi | 56% | 2395 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,157 psi | 55% | 2339 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 53,229 psi | 83% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,185 psi | 83% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,527 psi | 70% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,582 psi | 64% | 2434 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 36,956 psi | 58% | 2372 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,445 psi | 81% | 2536 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,958 psi | 63% | 2438 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,285 psi | 49% | 2300 fps | 97.8% |
| Vihtavuori N560 | 72.4 gr | 92% | 46,006 psi | 72% | 2641 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 45,281 psi | 71% | 2618 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,566 psi | 62% | 2405 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,408 psi | 65% | 2490 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,831 psi | 39% | 2211 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,320 psi | 62% | 2428 fps | 95.4% |
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 93 powders for 8 x 57 PCC loaded with the .323 | 220gr | Woodleigh PP SN. Norma MRP delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,825 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2225 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 8 x 57 PCC with the .323 | 220gr | Woodleigh PP SN 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.