Load Specifications
Load data in caliber .308 Norma Mag. with .307 | 150gr | Rhino Penetrator bullet and 97 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 ReloadSwiss RS 60.
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% | 54,679 psi | 86% | 2936 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,508 psi | 90% | 3012 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,434 psi | 87% | 3028 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,173 psi | 88% | 3009 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,788 psi | 70% | 2900 fps | 96.5% |
| Accurate 4064 | <<locked>> | 90% | 57,551 psi | 90% | 3061 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,128 psi | 85% | 3097 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 57,348 psi | 90% | 3094 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,027 psi | 86% | 3038 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,231 psi | 88% | 3041 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,421 psi | 90% | 3015 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,682 psi | 90% | 3225 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,390 psi | 87% | 3064 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,825 psi | 87% | 3087 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,085 psi | 86% | 3156 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,623 psi | 89% | 3196 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,279 psi | 66% | 2927 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,979 psi | 75% | 3114 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,450 psi | 90% | 3107 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 56,101 psi | 88% | 3081 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,825 psi | 87% | 3048 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,433 psi | 85% | 2969 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,941 psi | 88% | 3071 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,855 psi | 89% | 3094 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 96% | 56,826 psi | 89% | 3150 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 94% | 57,116 psi | 90% | 3107 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 54,476 psi | 85% | 3051 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3077 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,259 psi | 85% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,711 psi | 90% | 3189 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 56% | 1906 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,579 psi | 87% | 3051 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,752 psi | 86% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,433 psi | 85% | 3022 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,157 psi | 85% | 2995 fps | 97.5% |
| IMR 4350 | <<locked>> | 98% | 56,478 psi | 89% | 3077 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,433 psi | 85% | 3028 fps | 97.5% |
| IMR 4831 | <<locked>> | 98% | 54,708 psi | 86% | 3087 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 57,276 psi | 90% | 3120 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,231 psi | 88% | 3041 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,595 psi | 90% | 3068 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,710 psi | 89% | 3018 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,607 psi | 86% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,290 psi | 90% | 3074 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 55,013 psi | 86% | 3058 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 56,159 psi | 88% | 3035 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,652 psi | 89% | 3035 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,042 psi | 86% | 3074 fps | 99.9% |
| Norma 204 | <<locked>> | 98% | 57,188 psi | 90% | 3130 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 47,500 psi | 74% | 3061 fps | 96% |
| Norma URP | <<locked>> | 98% | 56,739 psi | 89% | 3140 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 55,724 psi | 87% | 3097 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 55,448 psi | 87% | 3130 fps | 98.6% |
| Ramshot TAC | <<locked>> | 84% | 56,594 psi | 89% | 3061 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,333 psi | 88% | 3077 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,985 psi | 89% | 3041 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,201 psi | 57% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,072 psi | 89% | 3074 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,608 psi | 89% | 3159 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,246 psi | 88% | 3196 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,882 psi | 84% | 3117 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,942 psi | 89% | 3209 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 57,000 psi | 89% | 3018 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,652 psi | 89% | 3035 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,883 psi | 88% | 3071 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,825 psi | 87% | 3048 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,290 psi | 90% | 3074 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,595 psi | 90% | 3068 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,607 psi | 86% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,013 psi | 86% | 3058 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,085 psi | 85% | 3077 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,187 psi | 86% | 3038 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,043 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,406 psi | 90% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,447 psi | 85% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,983 psi | 85% | 2969 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 57,595 psi | 90% | 3074 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,855 psi | 89% | 2966 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,839 psi | 86% | 3028 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 56,086 psi | 88% | 3068 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3143 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 3012 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 57,014 psi | 89% | 2930 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,711 psi | 90% | 2953 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,463 psi | 88% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,377 psi | 90% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,580 psi | 90% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,477 psi | 87% | 3081 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 56,913 psi | 89% | 3045 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,434 psi | 87% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,607 psi | 86% | 3084 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,978 psi | 74% | 3012 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,564 psi | 87% | 3051 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,072 psi | 89% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,072 psi | 89% | 3153 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,029 psi | 60% | 2940 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,927 psi | 88% | 3071 fps | 100% |
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% | 51,314 psi | 80% | 2884 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,338 psi | 69% | 2808 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,808 psi | 81% | 2972 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 49,226 psi | 77% | 2890 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 41,655 psi | 65% | 2838 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 41,930 psi | 66% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,650 psi | 56% | 2726 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 47,442 psi | 74% | 2923 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 40,451 psi | 63% | 2762 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,516 psi | 78% | 2930 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 50,531 psi | 79% | 2917 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,584 psi | 68% | 2959 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,292 psi | 63% | 2785 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,076 psi | 68% | 2851 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 35,389 psi | 55% | 2736 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,824 psi | 55% | 2749 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,908 psi | 48% | 2631 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 38,493 psi | 60% | 2897 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,934 psi | 74% | 2930 fps | 98.6% |
| Bofors RP3 | <<locked>> | 80% | 40,205 psi | 63% | 2792 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 46,325 psi | 73% | 2877 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,227 psi | 80% | 2920 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,950 psi | 77% | 2956 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,843 psi | 64% | 2795 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 88% | 43,482 psi | 68% | 2900 fps | 95% |
| Hodgdon H4350 | <<locked>> | 90% | 50,299 psi | 79% | 2989 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 47,921 psi | 75% | 2933 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,705 psi | 48% | 2572 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,208 psi | 69% | 2907 fps | 99.5% |
| Hodgdon Superformance | 71.5 gr | 90% | 46,311 psi | 73% | 2982 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 42% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,079 psi | 72% | 2884 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 47,950 psi | 75% | 2930 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,511 psi | 67% | 2802 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,846 psi | 70% | 2822 fps | 95.3% |
| IMR 4350 | <<locked>> | 92% | 46,731 psi | 73% | 2904 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,121 psi | 71% | 2854 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 34,432 psi | 54% | 2677 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 44,164 psi | 69% | 2887 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 49,516 psi | 78% | 2930 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 47,108 psi | 74% | 2904 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,224 psi | 74% | 2858 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 42,482 psi | 67% | 2805 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 39,566 psi | 62% | 2740 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 42,757 psi | 67% | 2825 fps | 95% |
| Norma 201 | <<locked>> | 80% | 46,543 psi | 73% | 2874 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 46,934 psi | 74% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,467 psi | 67% | 2841 fps | 98.6% |
| Norma 204 | <<locked>> | 96% | 53,635 psi | 84% | 3068 fps | 95.5% |
| Norma MRP | <<locked>> | 98% | 44,338 psi | 69% | 2992 fps | 95% |
| Norma URP | <<locked>> | 84% | 35,868 psi | 56% | 2726 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 42,380 psi | 66% | 2858 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 42,511 psi | 67% | 2887 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 49,559 psi | 78% | 2940 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,414 psi | 77% | 2963 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,447 psi | 84% | 2982 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 42% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,874 psi | 69% | 2835 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,861 psi | 72% | 2969 fps | 98.8% |
| ReloadSwiss RS 60 | 60.1 gr | 80% | 37,072 psi | 58% | 2822 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,389 psi | 55% | 2743 fps | 95% |
| ReloadSwiss RS 70 | 65.7 gr | 86% | 37,753 psi | 59% | 2808 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 50,589 psi | 79% | 2917 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,338 psi | 69% | 2822 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 37,695 psi | 59% | 2730 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 46,325 psi | 73% | 2877 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,566 psi | 62% | 2740 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,108 psi | 74% | 2904 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,482 psi | 67% | 2805 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 42,757 psi | 67% | 2825 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,696 psi | 61% | 2782 fps | 97.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,051 psi | 75% | 2913 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,021 psi | 72% | 2890 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,616 psi | 75% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,842 psi | 62% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,382 psi | 70% | 2795 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 53,925 psi | 85% | 3018 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,398 psi | 74% | 2822 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,819 psi | 75% | 2910 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 38,450 psi | 60% | 2736 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 28,036 psi | 44% | 2549 fps | 95.7% |
| Somchem S385 | <<locked>> | 98% | 47,601 psi | 75% | 2953 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 53,592 psi | 84% | 2881 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,037 psi | 75% | 2812 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,918 psi | 69% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,440 psi | 70% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,579 psi | 57% | 2667 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 82% | 34,969 psi | 55% | 2674 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 49,893 psi | 78% | 2930 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,975 psi | 67% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,782 psi | 58% | 2730 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 90% | 33,518 psi | 53% | 2713 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,401 psi | 51% | 2585 fps | 96.5% |
| Winchester 748 | <<locked>> | 80% | 49,821 psi | 78% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,700 psi | 68% | 2907 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 31,227 psi | 49% | 2723 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,788 psi | 72% | 2897 fps | 99.5% |
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 97 powders for .308 Norma Mag. loaded with the .307 | 150gr | Rhino Penetrator. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,225 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,225 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 150.0 gr projectile in 0.307" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, ReloadSwiss RS 60 rank at the top here: for .308 Norma Mag. with the .307 | 150gr | Rhino Penetrator 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.