Load Specifications
Load data in caliber 8 mm Rem. Mag. with .323 | 220gr | Woodleigh PP SN bullet and 100 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 58,958 psi | 88% | 2661 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 59,770 psi | 90% | 2749 fps | 99.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 58,740 psi | 88% | 2805 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 59,350 psi | 89% | 2717 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,782 psi | 85% | 2792 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,927 psi | 85% | 2900 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 86% | 58,842 psi | 88% | 2753 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,522 psi | 86% | 2844 fps | 99.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,929 psi | 88% | 2900 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 42,989 psi | 64% | 2621 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,058 psi | 57% | 2589 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 59,176 psi | 89% | 2884 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 60,046 psi | 90% | 2776 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 60,162 psi | 90% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,508 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 58,972 psi | 88% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,855 psi | 85% | 2831 fps | 99.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 58,218 psi | 87% | 2897 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,376 psi | 83% | 2815 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,732 psi | 72% | 2762 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 59,727 psi | 90% | 2959 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 57,566 psi | 86% | 2805 fps | 96.2% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,403 psi | 80% | 2825 fps | 99.2% |
| Bofors RP3 | <<locked>> | 84% | 57,566 psi | 86% | 2746 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,772 psi | 66% | 2697 fps | 97.1% |
| Bofors RP5ᴾ | <<locked>> | 100% | 58,218 psi | 87% | 2897 fps | 99.7% |
| Bofors RP7 | <<locked>> | 90% | 60,031 psi | 90% | 2792 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,282 psi | 71% | 2710 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 84% | 57,711 psi | 87% | 2769 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 58,885 psi | 88% | 2848 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 58,218 psi | 87% | 2805 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 98% | 59,117 psi | 89% | 2844 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,885 psi | 87% | 2825 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,986 psi | 87% | 2766 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 59,030 psi | 88% | 2792 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,891 psi | 70% | 2815 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 90% | 59,451 psi | 89% | 2890 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 55% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 59,393 psi | 89% | 2753 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 58,349 psi | 87% | 2733 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,261 psi | 86% | 2726 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 57,667 psi | 86% | 2776 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,957 psi | 87% | 2766 fps | 99.9% |
| IMR 4831 | <<locked>> | 92% | 57,072 psi | 86% | 2782 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 58,131 psi | 87% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,666 psi | 85% | 2772 fps | 98.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,391 psi | 85% | 2877 fps | 98.9% |
| Lovex S060 | <<locked>> | 82% | 59,553 psi | 89% | 2713 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 58,610 psi | 88% | 2723 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 58,392 psi | 88% | 2762 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 59,872 psi | 90% | 2805 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,805 psi | 73% | 2667 fps | 99.8% |
| Norma 201 | <<locked>> | 82% | 60,017 psi | 90% | 2733 fps | 100% |
| Norma 203B | <<locked>> | 84% | 59,437 psi | 89% | 2785 fps | 100% |
| Norma 204 | <<locked>> | 92% | 58,624 psi | 88% | 2835 fps | 99.5% |
| Norma MRP | <<locked>> | 98% | 58,030 psi | 87% | 2920 fps | 100% |
| Norma URP | <<locked>> | 92% | 58,943 psi | 88% | 2825 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,869 psi | 85% | 2766 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,145 psi | 86% | 2897 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 57,653 psi | 86% | 2831 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,024 psi | 76% | 2776 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,521 psi | 56% | 1729 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,479 psi | 86% | 2756 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 58,552 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,724 psi | 85% | 2818 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 58,943 psi | 88% | 2900 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,833 psi | 70% | 2812 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 82% | 57,203 psi | 86% | 2690 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,682 psi | 86% | 2743 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 59,219 psi | 89% | 2812 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 60,075 psi | 90% | 2874 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 90% | 60,031 psi | 90% | 2792 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 58,392 psi | 88% | 2762 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 58,610 psi | 88% | 2723 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 59,872 psi | 90% | 2805 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 59,161 psi | 89% | 2802 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 59,886 psi | 90% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,928 psi | 87% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 58,044 psi | 87% | 2720 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 59,596 psi | 89% | 2867 fps | 99.7% |
| Somchem S335 | <<locked>> | 82% | 60,220 psi | 90% | 2654 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 57,232 psi | 86% | 2733 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,276 psi | 86% | 2756 fps | 98.2% |
| Somchem S365 | <<locked>> | 94% | 58,958 psi | 88% | 2825 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,768 psi | 85% | 2792 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 57,725 psi | 87% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,798 psi | 87% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 58,624 psi | 88% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,319 psi | 86% | 2766 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,289 psi | 84% | 2772 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 84% | 59,538 psi | 89% | 2707 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 60,220 psi | 90% | 2825 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,870 psi | 87% | 2838 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 58,059 psi | 87% | 2917 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,951 psi | 75% | 2776 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,942 psi | 85% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 58,885 psi | 88% | 2848 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,155 psi | 77% | 2890 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 60,321 psi | 90% | 2776 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,869 psi | 85% | 2792 fps | 99.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 55,201 psi | 83% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 52,417 psi | 79% | 2644 fps | 99.4% |
| Accurate 3100 | <<locked>> | 80% | 29,907 psi | 45% | 2290 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 52,344 psi | 78% | 2628 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,495 psi | 61% | 2533 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 92% | 46,093 psi | 69% | 2723 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 49,095 psi | 74% | 2612 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,448 psi | 55% | 2461 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 42,279 psi | 63% | 2615 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 40,379 psi | 61% | 2569 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 94% | 31,560 psi | 47% | 2415 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 55,042 psi | 83% | 2828 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,893 psi | 75% | 2635 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,127 psi | 80% | 2700 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,189 psi | 59% | 2543 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,672 psi | 67% | 2654 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,390 psi | 55% | 2461 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,535 psi | 55% | 2510 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,848 psi | 43% | 2320 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,819 psi | 43% | 2333 fps | 95.8% |
| Alliant Reloder-26 | 67.3 gr | 80% | 30,951 psi | 46% | 2438 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 54,259 psi | 81% | 2753 fps | 95.5% |
| Bofors RP15 | <<locked>> | 88% | 36,245 psi | 54% | 2500 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 50,459 psi | 76% | 2648 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 38,290 psi | 57% | 2582 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 36,535 psi | 55% | 2510 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 44,005 psi | 66% | 2536 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 38,769 psi | 58% | 2536 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 50,691 psi | 76% | 2667 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,264 psi | 63% | 2575 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 45,179 psi | 68% | 2595 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 42,351 psi | 63% | 2569 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,367 psi | 67% | 2605 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,811 psi | 55% | 2434 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 55,332 psi | 83% | 2743 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,216 psi | 54% | 2572 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 41,191 psi | 62% | 2595 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,499 psi | 41% | 1506 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,695 psi | 83% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,677 psi | 77% | 2641 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,737 psi | 81% | 2674 fps | 99.8% |
| IMR 4350 | <<locked>> | 80% | 39,740 psi | 60% | 2474 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,527 psi | 68% | 2566 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 38,798 psi | 58% | 2487 fps | 99.6% |
| IMR 4895 | <<locked>> | 80% | 54,505 psi | 82% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 41,495 psi | 62% | 2513 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 40,393 psi | 61% | 2589 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 56,130 psi | 84% | 2667 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,967 psi | 78% | 2635 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,946 psi | 64% | 2516 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 41,234 psi | 62% | 2503 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 29,414 psi | 44% | 2274 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 56,260 psi | 84% | 2687 fps | 100% |
| Norma 203B | <<locked>> | 80% | 52,460 psi | 79% | 2687 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,131 psi | 59% | 2500 fps | 96% |
| Norma MRP | 67 gr | 82% | 33,417 psi | 50% | 2464 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 40,045 psi | 60% | 2523 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 80% | 53,098 psi | 80% | 2713 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 40,089 psi | 60% | 2595 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,798 psi | 58% | 2516 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 90% | 35,534 psi | 53% | 2480 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,050 psi | 42% | 1542 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,415 psi | 76% | 2651 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,427 psi | 71% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,263 psi | 60% | 2552 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,841 psi | 58% | 2566 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,098 psi | 50% | 2493 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 53,809 psi | 81% | 2644 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,500 psi | 71% | 2598 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,422 psi | 61% | 2500 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 35,491 psi | 53% | 2444 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 44,005 psi | 66% | 2536 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,946 psi | 64% | 2516 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 51,967 psi | 78% | 2635 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,234 psi | 62% | 2503 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,573 psi | 73% | 2651 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 56,014 psi | 84% | 2717 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,312 psi | 72% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,018 psi | 63% | 2464 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,201 psi | 53% | 2438 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 56,579 psi | 85% | 2608 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,543 psi | 71% | 2595 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,947 psi | 66% | 2543 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,724 psi | 55% | 2487 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,837 psi | 51% | 2379 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 54,244 psi | 81% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,215 psi | 81% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,469 psi | 68% | 2526 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,495 psi | 62% | 2520 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 86% | 35,534 psi | 53% | 2411 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 52,489 psi | 79% | 2615 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,930 psi | 61% | 2526 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 32,198 psi | 48% | 2392 fps | 98.8% |
| Vihtavuori N560 | 71.9 gr | 88% | 41,452 psi | 62% | 2628 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 40,770 psi | 61% | 2608 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,466 psi | 61% | 2490 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,409 psi | 64% | 2579 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,498 psi | 38% | 2316 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 56,318 psi | 84% | 2726 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,652 psi | 56% | 2464 fps | 95.8% |
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 105 powders for 8 mm Rem. Mag. loaded with the .323 | 220gr | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,959 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,959 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 50–90 %, 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 2217 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 mm Rem. Mag. with the .323 | 220gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 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.