Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:220 gr
Bullet Diameter:0.323"
Bullet Length:<<locked>>
Caliber:8 mm Rem. Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:98 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:66,717 psi
Recommended Twist Rate:1:13.5
Load data in caliber 8 mm Rem. Mag. with .323 | 220gr | Barnes Solid RN 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, Vihtavuori N560 and Norma MRP.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 58,392 psi | 88% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 59,335 psi | 89% | 2740 fps | 99.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 58,131 psi | 87% | 2795 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 58,842 psi | 88% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 60,075 psi | 90% | 2831 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 60,365 psi | 90% | 2946 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 86% | 58,363 psi | 87% | 2743 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,884 psi | 85% | 2831 fps | 99.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,392 psi | 88% | 2890 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,681 psi | 56% | 2575 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 58,407 psi | 88% | 2871 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 59,553 psi | 89% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 59,654 psi | 89% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,985 psi | 85% | 2835 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 58,479 psi | 88% | 2854 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 60,075 psi | 90% | 2874 fps | 99.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,638 psi | 86% | 2884 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,708 psi | 82% | 2805 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,210 psi | 71% | 2753 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 59,074 psi | 89% | 2949 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 57,217 psi | 86% | 2795 fps | 96% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,808 psi | 79% | 2812 fps | 99.1% |
| Bofors RP3 | <<locked>> | 84% | 57,072 psi | 86% | 2740 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,265 psi | 65% | 2684 fps | 96.9% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,638 psi | 86% | 2884 fps | 99.6% |
| Bofors RP7 | <<locked>> | 90% | 59,625 psi | 89% | 2782 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,833 psi | 70% | 2697 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 84% | 57,261 psi | 86% | 2759 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 58,233 psi | 87% | 2835 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 57,769 psi | 87% | 2795 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 98% | 58,537 psi | 88% | 2831 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,305 psi | 86% | 2812 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,261 psi | 86% | 2753 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 58,523 psi | 88% | 2782 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,354 psi | 69% | 2802 fps | 99% |
| Hodgdon Superformance | <<locked>> | 90% | 58,842 psi | 88% | 2877 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 55% | 1683 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,929 psi | 88% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,885 psi | 87% | 2726 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,797 psi | 85% | 2717 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 57,305 psi | 86% | 2769 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,551 psi | 86% | 2753 fps | 99.9% |
| IMR 4831 | <<locked>> | 94% | 60,263 psi | 90% | 2818 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,624 psi | 86% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 59,828 psi | 90% | 2815 fps | 98.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,796 psi | 84% | 2864 fps | 98.7% |
| Lovex S060 | <<locked>> | 82% | 59,277 psi | 89% | 2707 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 58,320 psi | 87% | 2717 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,928 psi | 87% | 2749 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 59,480 psi | 89% | 2799 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,211 psi | 72% | 2654 fps | 99.8% |
| Norma 201 | <<locked>> | 82% | 59,466 psi | 89% | 2726 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,943 psi | 88% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 92% | 58,218 psi | 87% | 2825 fps | 99.4% |
| Norma MRP | <<locked>> | 98% | 57,348 psi | 86% | 2910 fps | 100% |
| Norma URP | <<locked>> | 92% | 58,537 psi | 88% | 2815 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 60,162 psi | 90% | 2805 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,275 psi | 84% | 2881 fps | 99% |
| Ramshot Hunter | <<locked>> | 92% | 57,261 psi | 86% | 2825 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,546 psi | 76% | 2766 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 56% | 1722 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,014 psi | 85% | 2746 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 58,001 psi | 87% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 60,133 psi | 90% | 2858 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 58,363 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,412 psi | 70% | 2799 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 60,205 psi | 90% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,174 psi | 86% | 2733 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 58,595 psi | 88% | 2802 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 59,451 psi | 89% | 2861 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 90% | 59,625 psi | 89% | 2782 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,928 psi | 87% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 58,320 psi | 87% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 59,480 psi | 89% | 2799 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 58,711 psi | 88% | 2792 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 59,422 psi | 89% | 2762 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 59,973 psi | 90% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,696 psi | 86% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,406 psi | 86% | 2707 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,958 psi | 88% | 2858 fps | 99.7% |
| Somchem S335 | <<locked>> | 82% | 59,727 psi | 90% | 2644 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 56,797 psi | 85% | 2726 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,768 psi | 85% | 2746 fps | 98.1% |
| Somchem S365 | <<locked>> | 94% | 58,218 psi | 87% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 59,988 psi | 90% | 2835 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 57,145 psi | 86% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,276 psi | 86% | 2651 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 58,189 psi | 87% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,884 psi | 85% | 2759 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,738 psi | 84% | 2762 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 84% | 59,103 psi | 89% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 59,611 psi | 89% | 2815 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,159 psi | 86% | 2828 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,479 psi | 86% | 2904 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,371 psi | 74% | 2762 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 60,365 psi | 90% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 58,465 psi | 88% | 2838 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,415 psi | 76% | 2877 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 59,567 psi | 89% | 2766 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,304 psi | 84% | 2779 fps | 99.3% |
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% | 54,853 psi | 82% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,982 psi | 78% | 2635 fps | 99.3% |
| Accurate 3100 | <<locked>> | 80% | 29,544 psi | 44% | 2277 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 52,054 psi | 78% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,030 psi | 60% | 2520 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 92% | 45,527 psi | 68% | 2710 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 48,631 psi | 73% | 2602 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,100 psi | 54% | 2451 fps | 95% |
| ADI AR 2213 | <<locked>> | 90% | 41,959 psi | 63% | 2605 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 96% | 33,257 psi | 50% | 2461 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 54,505 psi | 82% | 2818 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,385 psi | 74% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,620 psi | 79% | 2690 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,725 psi | 58% | 2530 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,179 psi | 66% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,042 psi | 54% | 2451 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,187 psi | 54% | 2500 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,616 psi | 43% | 2310 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,529 psi | 43% | 2323 fps | 95.5% |
| Alliant Reloder-26 | 66.7 gr | 80% | 30,618 psi | 46% | 2425 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 53,708 psi | 81% | 2743 fps | 95.2% |
| Bofors RP15 | <<locked>> | 88% | 35,853 psi | 54% | 2490 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,966 psi | 75% | 2638 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 37,782 psi | 57% | 2569 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 36,187 psi | 54% | 2500 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,758 psi | 66% | 2530 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 38,348 psi | 57% | 2526 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 50,198 psi | 75% | 2654 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,003 psi | 63% | 2569 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,715 psi | 67% | 2582 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 90% | 44,730 psi | 67% | 2608 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,005 psi | 66% | 2595 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,376 psi | 55% | 2425 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,824 psi | 82% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 35,781 psi | 54% | 2559 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 40,843 psi | 61% | 2585 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 41% | 1503 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,216 psi | 83% | 2697 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,184 psi | 77% | 2631 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,258 psi | 80% | 2664 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 39,320 psi | 59% | 2464 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,121 psi | 68% | 2556 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 38,363 psi | 57% | 2474 fps | 99.5% |
| IMR 4895 | <<locked>> | 80% | 53,998 psi | 81% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,888 psi | 66% | 2556 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 90% | 40,045 psi | 60% | 2579 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 55,883 psi | 84% | 2661 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,634 psi | 77% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,670 psi | 64% | 2510 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 40,973 psi | 61% | 2497 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 29,037 psi | 44% | 2264 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 55,970 psi | 84% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,982 psi | 78% | 2677 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,914 psi | 58% | 2493 fps | 95.9% |
| Norma MRP | 66.4 gr | 82% | 33,069 psi | 50% | 2451 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,740 psi | 60% | 2516 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 80% | 52,634 psi | 79% | 2703 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 39,610 psi | 59% | 2582 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 38,566 psi | 58% | 2507 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 90% | 35,259 psi | 53% | 2470 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 42% | 1539 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,980 psi | 75% | 2641 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,920 psi | 70% | 2687 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,827 psi | 60% | 2539 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,464 psi | 58% | 2556 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,721 psi | 49% | 2477 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 53,316 psi | 80% | 2635 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,181 psi | 71% | 2592 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,045 psi | 60% | 2487 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 35,099 psi | 53% | 2431 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,758 psi | 66% | 2530 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,670 psi | 64% | 2510 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 51,634 psi | 77% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,973 psi | 61% | 2497 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,312 psi | 72% | 2644 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 55,753 psi | 84% | 2713 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 56,565 psi | 85% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,066 psi | 72% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,800 psi | 63% | 2457 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,130 psi | 56% | 2480 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 56,333 psi | 84% | 2605 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,253 psi | 71% | 2589 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,482 psi | 65% | 2530 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 36,245 psi | 54% | 2474 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,475 psi | 50% | 2369 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 53,911 psi | 81% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,896 psi | 81% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,179 psi | 68% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,031 psi | 62% | 2510 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 35,186 psi | 53% | 2402 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 52,069 psi | 78% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,538 psi | 61% | 2516 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 31,778 psi | 48% | 2379 fps | 98.6% |
| Vihtavuori N560 | 72.8 gr | 90% | 43,758 psi | 66% | 2671 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 40,248 psi | 60% | 2595 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,118 psi | 60% | 2480 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,003 psi | 63% | 2569 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,309 psi | 38% | 2306 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,869 psi | 84% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,318 psi | 56% | 2454 fps | 95.6% |
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 100 powders for 8 mm Rem. Mag. loaded with the .323 | 220gr | Barnes Solid RN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,949 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, Vihtavuori N560, Norma MRP rank at the top here: for 8 mm Rem. Mag. with the .323 | 220gr | Barnes Solid RN 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.