Load Specifications
Bullet Manufacturer:Impala Bullets
Bullet Weight:200 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:1:13.0
Load data in caliber 8 mm Rem. Mag. with .323 | 200gr | Impala RNFP KO bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Hodgdon Superformance.
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% | 59,364 psi | 89% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,755 psi | 88% | 2838 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,653 psi | 86% | 2897 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 59,611 psi | 89% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 59,814 psi | 90% | 2943 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,972 psi | 88% | 3038 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 82% | 60,350 psi | 90% | 2894 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 57,827 psi | 87% | 2851 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 59,683 psi | 89% | 2982 fps | 99.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,305 psi | 86% | 2979 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,898 psi | 57% | 2657 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,261 psi | 86% | 2979 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 59,161 psi | 89% | 2877 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 59,292 psi | 89% | 2900 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 59,466 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,130 psi | 86% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,987 psi | 88% | 2969 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,536 psi | 85% | 2982 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,505 psi | 80% | 2907 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,833 psi | 70% | 2844 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,566 psi | 86% | 3054 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,025 psi | 78% | 2907 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 56,985 psi | 85% | 2848 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,536 psi | 85% | 2982 fps | 99% |
| Bofors RP7 | <<locked>> | 90% | 59,292 psi | 89% | 2884 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,543 psi | 70% | 2779 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 56,898 psi | 85% | 2864 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,479 psi | 86% | 2936 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 56,855 psi | 85% | 2887 fps | 99% |
| Hodgdon H4831 | <<locked>> | 98% | 57,435 psi | 86% | 2920 fps | 97.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 60,075 psi | 90% | 2959 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 60,060 psi | 90% | 2904 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,914 psi | 87% | 2894 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,905 psi | 69% | 2884 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 90% | 57,609 psi | 86% | 2976 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 55% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,117 psi | 87% | 2851 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,479 psi | 86% | 2835 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 59,785 psi | 90% | 2867 fps | 99.8% |
| IMR 4350 | <<locked>> | 94% | 59,930 psi | 90% | 2917 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 60,321 psi | 90% | 2904 fps | 99.8% |
| IMR 4831 | <<locked>> | 94% | 59,640 psi | 89% | 2927 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,159 psi | 86% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,943 psi | 88% | 2907 fps | 97.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,868 psi | 82% | 2953 fps | 97.6% |
| Lovex S060 | <<locked>> | 82% | 58,682 psi | 88% | 2812 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 58,059 psi | 87% | 2828 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,609 psi | 86% | 2854 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 58,987 psi | 88% | 2900 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,559 psi | 73% | 2759 fps | 99.4% |
| Norma 201 | <<locked>> | 82% | 59,393 psi | 89% | 2838 fps | 100% |
| Norma 202 | <<locked>> | 82% | 59,915 psi | 90% | 2828 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,653 psi | 88% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,101 psi | 86% | 2917 fps | 98.7% |
| Norma MRPᴾ | <<locked>> | 100% | 59,988 psi | 90% | 3061 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 57,638 psi | 86% | 2920 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 59,146 psi | 89% | 2910 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,230 psi | 83% | 2969 fps | 98% |
| Ramshot Hunter | <<locked>> | 94% | 59,828 psi | 90% | 2976 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,705 psi | 75% | 2848 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,681 psi | 56% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 60,002 psi | 90% | 2897 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,637 psi | 85% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 59,103 psi | 89% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,159 psi | 86% | 2989 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,934 psi | 69% | 2877 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 84% | 60,104 psi | 90% | 2838 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,058 psi | 86% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,769 psi | 87% | 2894 fps | 98% |
| Rottweil R 905 | <<locked>> | 98% | 58,436 psi | 88% | 2956 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 90% | 59,292 psi | 89% | 2884 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,609 psi | 86% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 58,059 psi | 87% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,987 psi | 88% | 2900 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,783 psi | 87% | 2897 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,726 psi | 88% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 59,770 psi | 90% | 2759 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,101 psi | 86% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,276 psi | 86% | 2808 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,928 psi | 87% | 2953 fps | 99% |
| Somchem S335 | <<locked>> | 82% | 59,495 psi | 89% | 2756 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 60,075 psi | 90% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 59,698 psi | 89% | 2887 fps | 97.6% |
| Somchem S365 | <<locked>> | 94% | 57,290 psi | 86% | 2923 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 59,350 psi | 89% | 2933 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 82% | 60,147 psi | 90% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 57,145 psi | 86% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,869 psi | 85% | 2759 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,899 psi | 87% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 59,669 psi | 89% | 2910 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,723 psi | 82% | 2851 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 84% | 58,581 psi | 88% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 59,030 psi | 88% | 2920 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 60,191 psi | 90% | 2986 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 60,060 psi | 90% | 3051 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,733 psi | 73% | 2854 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 59,030 psi | 88% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,711 psi | 87% | 2940 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,907 psi | 73% | 2982 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 59,074 psi | 89% | 2877 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 59,263 psi | 89% | 2927 fps | 99% |
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% | 55,970 psi | 84% | 2730 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,982 psi | 78% | 2733 fps | 98.6% |
| Accurate 3100 | <<locked>> | 82% | 32,822 psi | 49% | 2438 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 52,953 psi | 79% | 2740 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,886 psi | 61% | 2631 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 48,356 psi | 72% | 2861 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 56,942 psi | 85% | 2848 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 48,559 psi | 73% | 2707 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,191 psi | 62% | 2651 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 47,471 psi | 71% | 2808 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 98% | 35,839 psi | 54% | 2602 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,447 psi | 80% | 2920 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,574 psi | 74% | 2736 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,663 psi | 79% | 2802 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,972 psi | 58% | 2631 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,874 psi | 66% | 2749 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,915 psi | 61% | 2648 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,307 psi | 62% | 2703 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,486 psi | 44% | 2411 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,169 psi | 47% | 2470 fps | 95.3% |
| Alliant Reloder-26 | 66.8 gr | 80% | 31,386 psi | 47% | 2526 fps | 96.5% |
| Bofors RP15 | <<locked>> | 92% | 40,756 psi | 61% | 2690 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 50,415 psi | 76% | 2753 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,307 psi | 62% | 2703 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,048 psi | 66% | 2628 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 43,613 psi | 65% | 2720 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 50,256 psi | 75% | 2759 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,003 psi | 63% | 2664 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,730 psi | 67% | 2680 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 47,369 psi | 71% | 2749 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,647 psi | 74% | 2795 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,782 psi | 55% | 2526 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,186 psi | 81% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,479 psi | 58% | 2707 fps | 95% |
| Hodgdon Superformance | 68.9 gr | 80% | 40,756 psi | 61% | 2674 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 42% | 1575 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,839 psi | 82% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,111 psi | 77% | 2740 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,055 psi | 80% | 2766 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 39,479 psi | 59% | 2556 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,991 psi | 67% | 2651 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 38,972 psi | 58% | 2582 fps | 99% |
| IMR 4895 | <<locked>> | 80% | 53,954 psi | 81% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,441 psi | 70% | 2697 fps | 95% |
| IMR 7828 SSC | <<locked>> | 94% | 45,411 psi | 68% | 2779 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 55,405 psi | 83% | 2766 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,779 psi | 78% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,120 psi | 65% | 2612 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 41,524 psi | 62% | 2598 fps | 97.5% |
| Lovex S071 | <<locked>> | 86% | 32,198 psi | 48% | 2421 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 56,086 psi | 84% | 2792 fps | 100% |
| Norma 202 | <<locked>> | 80% | 56,550 psi | 85% | 2785 fps | 100% |
| Norma 203B | <<locked>> | 80% | 52,054 psi | 78% | 2789 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,510 psi | 62% | 2641 fps | 95.4% |
| Norma MRP | <<locked>> | 84% | 35,781 psi | 54% | 2605 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,987 psi | 60% | 2615 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 52,098 psi | 78% | 2808 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,237 psi | 68% | 2785 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,653 psi | 58% | 2605 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 38,116 psi | 57% | 2615 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 43% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,009 psi | 75% | 2743 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,383 psi | 70% | 2795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,248 psi | 60% | 2644 fps | 99% |
| ReloadSwiss RS 70 | 66.2 gr | 80% | 38,566 psi | 58% | 2648 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,884 psi | 57% | 2690 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 53,548 psi | 80% | 2746 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,572 psi | 71% | 2700 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,295 psi | 68% | 2684 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 40,161 psi | 60% | 2635 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,048 psi | 66% | 2628 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,120 psi | 65% | 2612 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 51,779 psi | 78% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,524 psi | 62% | 2598 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,022 psi | 72% | 2746 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 55,274 psi | 83% | 2818 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 56,333 psi | 84% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,935 psi | 72% | 2589 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,279 psi | 63% | 2556 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,784 psi | 60% | 2628 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 56,246 psi | 84% | 2713 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,514 psi | 71% | 2697 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,371 psi | 74% | 2726 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,564 psi | 55% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,376 psi | 55% | 2516 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 56,739 psi | 85% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 53,809 psi | 81% | 2703 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,621 psi | 80% | 2717 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,397 psi | 68% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,307 psi | 62% | 2612 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 37,797 psi | 57% | 2546 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 51,909 psi | 78% | 2717 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,814 psi | 61% | 2615 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,750 psi | 49% | 2490 fps | 98% |
| Vihtavuori N560 | <<locked>> | 92% | 46,441 psi | 70% | 2818 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 45,745 psi | 69% | 2799 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,103 psi | 60% | 2575 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,148 psi | 63% | 2671 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,484 psi | 40% | 2408 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,535 psi | 83% | 2828 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,147 psi | 60% | 2602 fps | 95.2% |
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 101 powders for 8 mm Rem. Mag. loaded with the .323 | 200gr | Impala RNFP KO. Norma MRP delivers the highest muzzle velocity at 3,061 fps; across all powders the maximum-charge window runs from 1,762 fps to 3,061 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 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 200.0 gr projectile in 0.323" calls for a 1:13.0 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, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for 8 mm Rem. Mag. with the .323 | 200gr | Impala RNFP KO 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.