Load Specifications
Load data in caliber .308 Norma Mag. with .308 | 150gr | Frontier PH HPFB bullet and 96 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% | 54,839 psi | 86% | 2936 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,711 psi | 90% | 3015 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,361 psi | 87% | 3028 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,289 psi | 88% | 3012 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,701 psi | 70% | 2900 fps | 96.5% |
| Accurate 4064 | <<locked>> | 90% | 57,740 psi | 90% | 3064 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,259 psi | 85% | 3097 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 57,522 psi | 90% | 3097 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,158 psi | 86% | 3041 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,391 psi | 88% | 3045 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,624 psi | 90% | 3015 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,737 psi | 84% | 3159 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,332 psi | 87% | 3064 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,767 psi | 87% | 3087 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,201 psi | 87% | 3159 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,478 psi | 89% | 3192 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,395 psi | 66% | 2930 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,892 psi | 75% | 3110 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,566 psi | 90% | 3114 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 56,231 psi | 88% | 3084 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,985 psi | 88% | 3051 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,346 psi | 85% | 2969 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,072 psi | 88% | 3074 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,014 psi | 89% | 3097 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 96% | 57,000 psi | 89% | 3153 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 94% | 57,290 psi | 90% | 3110 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 54,650 psi | 86% | 3054 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,143 psi | 86% | 3077 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,375 psi | 85% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,722 psi | 84% | 3123 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 56% | 1903 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,709 psi | 87% | 3051 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,636 psi | 86% | 3035 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,592 psi | 86% | 3025 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,302 psi | 85% | 2999 fps | 97.5% |
| IMR 4350 | <<locked>> | 98% | 56,376 psi | 88% | 3074 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,696 psi | 90% | 3081 fps | 98% |
| IMR 4831 | <<locked>> | 98% | 54,824 psi | 86% | 3091 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 57,145 psi | 90% | 3117 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,391 psi | 88% | 3045 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,725 psi | 90% | 3071 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,623 psi | 89% | 3018 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,476 psi | 85% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,406 psi | 90% | 3077 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 54,940 psi | 86% | 3058 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 56,289 psi | 88% | 3038 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,811 psi | 89% | 3038 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,984 psi | 86% | 3074 fps | 99.9% |
| Norma 204 | <<locked>> | 98% | 57,363 psi | 90% | 3130 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 47,659 psi | 75% | 3064 fps | 96% |
| Norma URP | <<locked>> | 98% | 56,623 psi | 89% | 3136 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 55,912 psi | 88% | 3100 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 55,550 psi | 87% | 3136 fps | 98.6% |
| Ramshot TAC | <<locked>> | 84% | 56,695 psi | 89% | 3061 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,449 psi | 88% | 3081 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,145 psi | 90% | 3045 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,158 psi | 57% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,188 psi | 90% | 3077 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,507 psi | 89% | 3159 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,173 psi | 88% | 3192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,027 psi | 85% | 3117 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 57,072 psi | 89% | 3209 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 57,159 psi | 90% | 3018 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,797 psi | 89% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,057 psi | 88% | 3074 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,985 psi | 88% | 3051 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,406 psi | 90% | 3077 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,725 psi | 90% | 3071 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,476 psi | 85% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,940 psi | 86% | 3058 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,230 psi | 85% | 3081 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,376 psi | 87% | 3038 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,912 psi | 88% | 3064 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,319 psi | 90% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,578 psi | 86% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,624 psi | 90% | 3025 fps | 98.1% |
| Somchem S335 | <<locked>> | 86% | 57,014 psi | 89% | 2969 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,998 psi | 86% | 3031 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 56,246 psi | 88% | 3071 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 3143 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3012 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 56,942 psi | 89% | 2930 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,624 psi | 90% | 2953 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,637 psi | 89% | 2999 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,508 psi | 90% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,696 psi | 90% | 3048 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,651 psi | 87% | 3084 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 56,826 psi | 89% | 3041 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,579 psi | 87% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,708 psi | 86% | 3084 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,905 psi | 74% | 3012 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,724 psi | 87% | 3054 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,232 psi | 90% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,000 psi | 89% | 3153 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,101 psi | 60% | 2940 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,115 psi | 88% | 3074 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% | 51,503 psi | 81% | 2890 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,469 psi | 70% | 2812 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,677 psi | 81% | 2969 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 49,371 psi | 77% | 2894 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 41,756 psi | 65% | 2841 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 42,061 psi | 66% | 2805 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,752 psi | 56% | 2726 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 47,572 psi | 75% | 2923 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 40,393 psi | 63% | 2762 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,661 psi | 78% | 2933 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 50,444 psi | 79% | 2917 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,540 psi | 68% | 2959 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,379 psi | 63% | 2789 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,221 psi | 68% | 2858 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 35,520 psi | 56% | 2740 fps | 95.6% |
| Alliant Reloder-17 | 60.2 gr | 80% | 34,954 psi | 55% | 2753 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,980 psi | 49% | 2635 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 38,638 psi | 61% | 2897 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,108 psi | 74% | 2930 fps | 98.6% |
| Bofors RP3 | <<locked>> | 80% | 40,161 psi | 63% | 2792 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 46,441 psi | 73% | 2877 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,126 psi | 80% | 2917 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,863 psi | 77% | 2956 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,799 psi | 64% | 2795 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 88% | 43,584 psi | 68% | 2904 fps | 95% |
| Hodgdon H4350 | <<locked>> | 90% | 50,401 psi | 79% | 2992 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 48,051 psi | 75% | 2936 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,647 psi | 48% | 2572 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,353 psi | 70% | 2910 fps | 99.5% |
| Hodgdon Superformance | 71.6 gr | 90% | 46,470 psi | 73% | 2986 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 42% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,035 psi | 72% | 2884 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 48,124 psi | 75% | 2933 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,438 psi | 67% | 2799 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,962 psi | 70% | 2825 fps | 95.4% |
| IMR 4350 | <<locked>> | 92% | 46,688 psi | 73% | 2904 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,252 psi | 71% | 2858 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 34,534 psi | 54% | 2680 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 44,295 psi | 69% | 2890 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 49,661 psi | 78% | 2933 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 47,050 psi | 74% | 2904 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,123 psi | 74% | 2854 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 42,424 psi | 66% | 2802 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 39,697 psi | 62% | 2743 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 42,873 psi | 67% | 2828 fps | 95% |
| Norma 201 | <<locked>> | 80% | 46,702 psi | 73% | 2877 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 47,065 psi | 74% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,583 psi | 67% | 2844 fps | 98.7% |
| Norma 204 | <<locked>> | 96% | 53,490 psi | 84% | 3064 fps | 95.5% |
| Norma MRP | <<locked>> | 98% | 44,483 psi | 70% | 2995 fps | 95% |
| Norma URP | <<locked>> | 84% | 35,781 psi | 56% | 2726 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 42,279 psi | 66% | 2858 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 42,641 psi | 67% | 2890 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 49,705 psi | 78% | 2940 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,327 psi | 77% | 2963 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,592 psi | 84% | 2986 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 42% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,976 psi | 69% | 2838 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,021 psi | 72% | 2972 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,173 psi | 58% | 2825 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,505 psi | 56% | 2743 fps | 95% |
| ReloadSwiss RS 70 | 65.7 gr | 86% | 37,666 psi | 59% | 2808 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 50,531 psi | 79% | 2917 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,237 psi | 69% | 2822 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 37,855 psi | 59% | 2733 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 46,441 psi | 73% | 2877 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,697 psi | 62% | 2743 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,050 psi | 74% | 2904 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,424 psi | 66% | 2802 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 42,873 psi | 67% | 2828 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,827 psi | 61% | 2785 fps | 97.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,196 psi | 76% | 2917 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,137 psi | 72% | 2894 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,790 psi | 75% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,958 psi | 63% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,469 psi | 70% | 2799 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 47,529 psi | 74% | 2825 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,964 psi | 75% | 2913 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 38,595 psi | 60% | 2740 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 28,152 psi | 44% | 2552 fps | 95.8% |
| Somchem S385 | <<locked>> | 98% | 47,732 psi | 75% | 2953 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 53,737 psi | 84% | 2884 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,167 psi | 75% | 2815 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,077 psi | 69% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,570 psi | 70% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,695 psi | 57% | 2671 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 82% | 34,882 psi | 55% | 2671 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 49,806 psi | 78% | 2930 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,873 psi | 67% | 2795 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,883 psi | 58% | 2733 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 90% | 33,620 psi | 53% | 2720 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,503 psi | 51% | 2589 fps | 96.5% |
| Winchester 748 | <<locked>> | 80% | 49,980 psi | 78% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,801 psi | 69% | 2907 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 31,169 psi | 49% | 2720 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,745 psi | 72% | 2894 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 96 powders for .308 Norma Mag. loaded with the .308 | 150gr | Frontier PH HPFB. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,209 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,209 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 0.308" 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, Alliant Reloder-17 rank at the top here: for .308 Norma Mag. with the .308 | 150gr | Frontier PH HPFB 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.