Load Specifications
Load data in caliber .308 Norma Mag. with .308 | 155gr | Berger BT Target 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, Hodgdon Superformance and Alliant Reloder-17.
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 2015 | <<locked>> | 82% | 56,101 psi | 88% | 2910 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,564 psi | 87% | 2940 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,347 psi | 87% | 2992 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,143 psi | 86% | 2943 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,383 psi | 73% | 2894 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 55,680 psi | 87% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,927 psi | 88% | 3084 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,332 psi | 87% | 3018 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,405 psi | 88% | 3018 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,766 psi | 84% | 3054 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,624 psi | 90% | 3018 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,622 psi | 87% | 2943 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,405 psi | 87% | 3146 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,956 psi | 89% | 3045 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,348 psi | 90% | 3068 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,695 psi | 89% | 3140 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,491 psi | 85% | 3117 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3041 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,888 psi | 69% | 2923 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3104 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,230 psi | 87% | 3035 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 57,711 psi | 90% | 3061 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 57,522 psi | 90% | 3038 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,695 psi | 87% | 2949 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,725 psi | 90% | 3054 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 57,508 psi | 90% | 2995 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,853 psi | 86% | 3022 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 92% | 56,478 psi | 89% | 3104 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 96% | 56,652 psi | 89% | 3061 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 55,898 psi | 88% | 3028 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3061 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,072 psi | 88% | 3071 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,448 psi | 87% | 3114 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 56% | 1877 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,985 psi | 88% | 3015 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,752 psi | 86% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,143 psi | 86% | 2989 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,476 psi | 85% | 2963 fps | 97.9% |
| IMR 4350 | <<locked>> | 96% | 54,549 psi | 85% | 3005 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,753 psi | 87% | 3009 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 3028 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 55,317 psi | 87% | 3048 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,624 psi | 90% | 3018 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,622 psi | 87% | 2995 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,607 psi | 86% | 2943 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,043 psi | 88% | 3002 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,274 psi | 87% | 3002 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 56,521 psi | 89% | 3041 fps | 98.4% |
| Norma 201 | <<locked>> | 86% | 57,580 psi | 90% | 3015 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,636 psi | 86% | 2963 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,594 psi | 89% | 3054 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,143 psi | 86% | 3058 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 49,052 psi | 77% | 3054 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 54,824 psi | 86% | 3068 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 57,377 psi | 90% | 3081 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 57,377 psi | 90% | 3120 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 54,389 psi | 85% | 2982 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,172 psi | 85% | 3002 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,419 psi | 57% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,824 psi | 86% | 2999 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,418 psi | 85% | 3081 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,128 psi | 85% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,695 psi | 87% | 3104 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,708 psi | 86% | 3130 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 54,940 psi | 86% | 2943 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,607 psi | 86% | 2959 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,566 psi | 90% | 3054 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 3025 fps | 96% |
| Rottweil R 907 | <<locked>> | 94% | 57,522 psi | 90% | 3038 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,274 psi | 87% | 3002 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,622 psi | 87% | 2995 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,043 psi | 88% | 3002 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,521 psi | 89% | 3041 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,622 psi | 87% | 3061 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,710 psi | 89% | 3018 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,464 psi | 90% | 3045 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,201 psi | 87% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,796 psi | 87% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,593 psi | 87% | 2956 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,358 psi | 80% | 3018 fps | 95.9% |
| Somchem S335 | <<locked>> | 84% | 54,824 psi | 86% | 2897 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,289 psi | 88% | 3009 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,667 psi | 90% | 3048 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3123 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,620 psi | 82% | 3002 fps | 97.1% |
| Unknown powder | <<locked>> | 94% | 55,680 psi | 87% | 3074 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 84% | 55,579 psi | 87% | 2881 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,723 psi | 86% | 2927 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,347 psi | 87% | 2943 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,506 psi | 87% | 2972 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,116 psi | 90% | 3061 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 54,534 psi | 85% | 2963 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,087 psi | 89% | 2986 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,202 psi | 88% | 3068 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,675 psi | 76% | 3002 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,406 psi | 90% | 3038 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,478 psi | 89% | 3104 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,421 psi | 62% | 2943 fps | 99.7% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,911 psi | 86% | 3025 fps | 96.4% |
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 2015 | <<locked>> | 80% | 52,678 psi | 83% | 2861 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,701 psi | 72% | 2789 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,764 psi | 81% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,310 psi | 71% | 2769 fps | 95% |
| Accurate 3100 | <<locked>> | 96% | 40,335 psi | 63% | 2772 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 43,221 psi | 68% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,490 psi | 54% | 2657 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 48,689 psi | 76% | 2904 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 41,350 psi | 65% | 2746 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 98% | 50,488 psi | 79% | 2995 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,792 psi | 80% | 2910 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,040 psi | 82% | 2894 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,918 psi | 70% | 2949 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,437 psi | 65% | 2772 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,324 psi | 69% | 2838 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,214 psi | 54% | 2671 fps | 95.5% |
| Alliant Reloder-17 | 60.4 gr | 80% | 36,100 psi | 57% | 2746 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,647 psi | 78% | 2982 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,965 psi | 47% | 2572 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 92% | 37,188 psi | 58% | 2828 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,298 psi | 76% | 2913 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 41,481 psi | 65% | 2779 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 44,672 psi | 70% | 2805 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,431 psi | 82% | 2897 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,328 psi | 79% | 2940 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 53,954 psi | 85% | 2943 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,047 psi | 66% | 2782 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 84% | 42,859 psi | 67% | 2848 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 90% | 47,108 psi | 74% | 2890 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 49,226 psi | 77% | 2917 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,675 psi | 47% | 2510 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,960 psi | 67% | 2838 fps | 99.5% |
| Hodgdon Superformance | 70.2 gr | 88% | 44,585 psi | 70% | 2910 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 42% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,845 psi | 69% | 2802 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 45,339 psi | 71% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,567 psi | 64% | 2720 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,844 psi | 67% | 2743 fps | 95.2% |
| IMR 4350 | <<locked>> | 90% | 45,165 psi | 71% | 2835 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,540 psi | 68% | 2785 fps | 95.3% |
| IMR 4831 | <<locked>> | 86% | 34,316 psi | 54% | 2638 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 45,455 psi | 71% | 2871 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 50,792 psi | 80% | 2910 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,515 psi | 76% | 2884 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,370 psi | 76% | 2838 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 43,685 psi | 68% | 2789 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,232 psi | 60% | 2671 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 41,350 psi | 65% | 2759 fps | 95% |
| Norma 201 | <<locked>> | 80% | 47,790 psi | 75% | 2854 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,240 psi | 76% | 2858 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,700 psi | 68% | 2828 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 51,488 psi | 81% | 2992 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 42,772 psi | 67% | 2923 fps | 95% |
| Norma URP | <<locked>> | 82% | 34,534 psi | 54% | 2657 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 43,671 psi | 68% | 2844 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 41,176 psi | 65% | 2822 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 50,792 psi | 80% | 2920 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,749 psi | 80% | 2946 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 43% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,380 psi | 66% | 2766 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,340 psi | 74% | 2956 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,406 psi | 60% | 2815 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,637 psi | 57% | 2736 fps | 95.9% |
| ReloadSwiss RS 70 | 64.4 gr | 84% | 36,347 psi | 57% | 2740 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 51,909 psi | 81% | 2897 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,556 psi | 71% | 2805 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 38,914 psi | 61% | 2720 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 98% | 48,298 psi | 76% | 2959 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 44,672 psi | 70% | 2805 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,232 psi | 60% | 2671 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,515 psi | 76% | 2884 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,685 psi | 68% | 2789 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 41,350 psi | 65% | 2759 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,914 psi | 63% | 2772 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,371 psi | 77% | 2900 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,268 psi | 74% | 2874 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,791 psi | 76% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,944 psi | 64% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,844 psi | 67% | 2726 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,819 psi | 75% | 2953 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 48,544 psi | 76% | 2799 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,124 psi | 77% | 2894 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,610 psi | 62% | 2723 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 28,993 psi | 45% | 2549 fps | 96.8% |
| Somchem S385 | <<locked>> | 96% | 46,050 psi | 72% | 2884 fps | 95.5% |
| Unknown powder | <<locked>> | 82% | 37,507 psi | 59% | 2723 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,211 psi | 77% | 2789 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,252 psi | 71% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,658 psi | 72% | 2789 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,695 psi | 59% | 2654 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 82% | 36,114 psi | 57% | 2664 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 51,213 psi | 80% | 2910 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,164 psi | 69% | 2779 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,650 psi | 56% | 2664 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 32,706 psi | 51% | 2657 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,301 psi | 52% | 2575 fps | 97.3% |
| Winchester 760 | <<locked>> | 84% | 42,859 psi | 67% | 2848 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,197 psi | 47% | 2661 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,082 psi | 80% | 2963 fps | 95.5% |
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 114 powders for .308 Norma Mag. loaded with the .308 | 155gr | Berger BT Target. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,146 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,146 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .308 Norma Mag. with the .308 | 155gr | Berger BT Target they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Alliant Reloder-22, Bofors RP15 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.