Load Specifications
Load data in caliber .308 Norma Mag. with .308 | 170gr | Sierra Pro-Hunter bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 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.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,998 psi | 86% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,188 psi | 88% | 2877 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2913 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 55,230 psi | 87% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,985 psi | 88% | 2969 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,129 psi | 86% | 3061 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 82% | 57,624 psi | 90% | 2940 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,288 psi | 87% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,898 psi | 89% | 3012 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,766 psi | 86% | 3002 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,447 psi | 85% | 3015 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,231 psi | 88% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,318 psi | 88% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,695 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,404 psi | 85% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,159 psi | 88% | 2995 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 2999 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,488 psi | 79% | 2933 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,961 psi | 69% | 2848 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,230 psi | 85% | 3071 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,725 psi | 90% | 2959 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,950 psi | 77% | 2913 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 57,043 psi | 89% | 2933 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 2999 fps | 97.8% |
| Bofors RP7 | <<locked>> | 90% | 56,420 psi | 88% | 2920 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 57,392 psi | 90% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,607 psi | 86% | 2963 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 54,288 psi | 85% | 2920 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 54,766 psi | 86% | 2946 fps | 95.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,522 psi | 90% | 2989 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,101 psi | 89% | 2946 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,129 psi | 86% | 2933 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,723 psi | 86% | 2999 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 57% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,724 psi | 87% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,911 psi | 86% | 2881 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,392 psi | 90% | 2910 fps | 99.2% |
| IMR 4350 | <<locked>> | 94% | 57,217 psi | 90% | 2949 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,505 psi | 85% | 2890 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 56,492 psi | 89% | 2959 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,259 psi | 85% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,318 psi | 88% | 2933 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,112 psi | 82% | 2969 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 56,260 psi | 88% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,027 psi | 86% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,781 psi | 86% | 2890 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 55,999 psi | 88% | 2930 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,817 psi | 70% | 2762 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 56,391 psi | 88% | 2884 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,029 psi | 89% | 2877 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,608 psi | 87% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,592 psi | 86% | 2946 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 56,942 psi | 89% | 3087 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 54,781 psi | 86% | 2953 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,391 psi | 88% | 2949 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,489 psi | 82% | 2989 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 57,058 psi | 89% | 3005 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,717 psi | 73% | 2854 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 58% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,319 psi | 90% | 2936 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,435 psi | 90% | 3009 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,882 psi | 84% | 2989 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,811 psi | 87% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,259 psi | 85% | 3018 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,033 psi | 67% | 2864 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 84% | 56,927 psi | 89% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,130 psi | 90% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,085 psi | 86% | 2923 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 98% | 55,564 psi | 87% | 2986 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 56,420 psi | 88% | 2920 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,781 psi | 86% | 2890 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 55,027 psi | 86% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,999 psi | 88% | 2930 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,056 psi | 86% | 2936 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,043 psi | 88% | 2910 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,203 psi | 90% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,607 psi | 86% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,404 psi | 85% | 2841 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,085 psi | 86% | 2979 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 56,884 psi | 89% | 2808 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,058 psi | 89% | 2927 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,072 psi | 89% | 2920 fps | 96.3% |
| Somchem S365 | <<locked>> | 96% | 57,624 psi | 90% | 3005 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,115 psi | 88% | 2959 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 82% | 57,682 psi | 90% | 2792 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,406 psi | 90% | 2841 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,595 psi | 90% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,839 psi | 86% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,797 psi | 89% | 2946 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,779 psi | 81% | 2874 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 55,840 psi | 88% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,869 psi | 88% | 2953 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3012 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3074 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,594 psi | 89% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,839 psi | 86% | 2969 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,672 psi | 72% | 2989 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,362 psi | 88% | 2920 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,550 psi | 89% | 2956 fps | 98% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 51,503 psi | 81% | 2759 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,182 psi | 77% | 2759 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 35,752 psi | 56% | 2572 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 48,805 psi | 76% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,115 psi | 58% | 2621 fps | 97.7% |
| Accurate High Country | <<locked>> | 94% | 47,761 psi | 75% | 2927 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 54,114 psi | 85% | 2887 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,934 psi | 72% | 2736 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 43,990 psi | 69% | 2776 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 51,024 psi | 80% | 2936 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,720 psi | 79% | 2949 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,470 psi | 73% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,647 psi | 78% | 2831 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,158 psi | 57% | 2628 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,930 psi | 64% | 2756 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,468 psi | 68% | 2766 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,801 psi | 69% | 2818 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,571 psi | 42% | 2375 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,200 psi | 54% | 2612 fps | 95.4% |
| Alliant Reloder-26 | 67.9 gr | 84% | 32,430 psi | 51% | 2608 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,041 psi | 85% | 2904 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 43,134 psi | 68% | 2799 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 46,920 psi | 74% | 2776 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,801 psi | 69% | 2818 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,234 psi | 65% | 2641 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 47,181 psi | 74% | 2782 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 39,117 psi | 61% | 2667 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 42,105 psi | 66% | 2694 fps | 95% |
| Hodgdon H4831 | <<locked>> | 96% | 51,227 psi | 80% | 2884 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,548 psi | 84% | 2923 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,692 psi | 53% | 2523 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,488 psi | 81% | 2877 fps | 100% |
| Hodgdon Superformance | 68.4 gr | 82% | 40,857 psi | 64% | 2740 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 43% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,272 psi | 82% | 2844 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,298 psi | 76% | 2769 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,662 psi | 79% | 2802 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 39,378 psi | 62% | 2618 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,627 psi | 67% | 2671 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 35,679 psi | 56% | 2572 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 50,908 psi | 80% | 2858 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,866 psi | 83% | 2877 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 98% | 48,747 psi | 76% | 2907 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 53,098 psi | 83% | 2815 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,704 psi | 76% | 2772 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,161 psi | 63% | 2621 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 38,334 psi | 60% | 2598 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 34,621 psi | 54% | 2543 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 52,939 psi | 83% | 2831 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,534 psi | 84% | 2828 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,994 psi | 77% | 2818 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,425 psi | 70% | 2762 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 40,234 psi | 63% | 2769 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,854 psi | 58% | 2615 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 49,255 psi | 77% | 2838 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,762 psi | 76% | 2917 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 35,853 psi | 56% | 2598 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 43,395 psi | 68% | 2789 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 43% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,152 psi | 74% | 2766 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,766 psi | 84% | 2953 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,497 psi | 68% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,883 psi | 58% | 2638 fps | 97.3% |
| ReloadSwiss RS 70 | 64.1 gr | 80% | 35,810 psi | 56% | 2638 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,132 psi | 63% | 2795 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 50,314 psi | 79% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,990 psi | 69% | 2717 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,631 psi | 76% | 2812 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 42,540 psi | 67% | 2746 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 41,234 psi | 65% | 2641 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,161 psi | 63% | 2621 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 48,704 psi | 76% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,334 psi | 60% | 2598 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,252 psi | 71% | 2772 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,678 psi | 83% | 2858 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,606 psi | 84% | 2762 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,324 psi | 71% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,233 psi | 61% | 2562 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,034 psi | 71% | 2799 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 53,490 psi | 84% | 2762 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,411 psi | 70% | 2717 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 53,214 psi | 83% | 2858 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 33,417 psi | 52% | 2572 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 40,422 psi | 63% | 2671 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 54,157 psi | 85% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,575 psi | 79% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,749 psi | 80% | 2759 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,308 psi | 66% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,319 psi | 60% | 2618 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 42,482 psi | 67% | 2707 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 49,124 psi | 77% | 2753 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,797 psi | 59% | 2615 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,124 psi | 46% | 2454 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 96% | 49,980 psi | 78% | 2946 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,536 psi | 59% | 2585 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,117 psi | 61% | 2667 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,745 psi | 42% | 2464 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,736 psi | 83% | 2864 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,672 psi | 72% | 2772 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 106 powders for .308 Norma Mag. loaded with the .308 | 170gr | Sierra Pro-Hunter. Norma MRP delivers the highest muzzle velocity at 3,087 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,087 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:6.0 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .308 Norma Mag. with the .308 | 170gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.