Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 150gr | Norma Kalahari bullet and 95 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% | 54,244 psi | 87% | 2910 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,374 psi | 86% | 2936 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,679 psi | 88% | 2999 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,666 psi | 89% | 2982 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,976 psi | 71% | 2864 fps | 96.1% |
| Accurate 4064 | <<locked>> | 88% | 53,287 psi | 85% | 2979 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,316 psi | 85% | 3064 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 84% | 53,476 psi | 86% | 3009 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 54,418 psi | 87% | 3009 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,767 psi | 89% | 3012 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,258 psi | 85% | 2940 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 52,982 psi | 85% | 3123 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,505 psi | 87% | 3031 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,187 psi | 88% | 3058 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,404 psi | 87% | 3123 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,695 psi | 89% | 3163 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,771 psi | 67% | 2897 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,137 psi | 76% | 3074 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,026 psi | 85% | 3015 fps | 99.3% |
| Bofors RP3 | <<locked>> | 90% | 55,448 psi | 89% | 3051 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,361 psi | 89% | 3018 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,896 psi | 86% | 2943 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,288 psi | 89% | 3041 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,086 psi | 90% | 3061 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 96% | 55,956 psi | 90% | 3114 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 92% | 53,011 psi | 85% | 3015 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 84% | 53,998 psi | 87% | 3022 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,259 psi | 87% | 3045 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,606 psi | 86% | 3054 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 52,953 psi | 85% | 3087 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,766 psi | 57% | 1890 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,143 psi | 88% | 3022 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,041 psi | 87% | 3005 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,041 psi | 87% | 2995 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,795 psi | 86% | 2969 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 55,666 psi | 89% | 3041 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,664 psi | 86% | 2992 fps | 97.2% |
| IMR 4831 | <<locked>> | 98% | 53,751 psi | 86% | 3051 fps | 99.4% |
| IMR 4895 | <<locked>> | 86% | 53,113 psi | 85% | 3031 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 55,767 psi | 89% | 3012 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,330 psi | 86% | 2986 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,028 psi | 90% | 2986 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 53,867 psi | 86% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,113 psi | 85% | 2986 fps | 98.3% |
| Lovex S070 | <<locked>> | 96% | 54,346 psi | 87% | 3025 fps | 97.6% |
| Norma 201 | <<locked>> | 86% | 55,622 psi | 89% | 3009 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,173 psi | 90% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,404 psi | 87% | 3041 fps | 99.9% |
| Norma 204 | <<locked>> | 98% | 56,405 psi | 90% | 3094 fps | 96% |
| Norma URP | <<locked>> | 98% | 55,767 psi | 89% | 3104 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 54,955 psi | 88% | 3064 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 54,636 psi | 88% | 3097 fps | 98.3% |
| Ramshot TAC | <<locked>> | 84% | 56,057 psi | 90% | 3028 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,724 psi | 89% | 3048 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,391 psi | 90% | 3009 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,158 psi | 58% | 1929 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,362 psi | 90% | 3041 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,637 psi | 89% | 3123 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,303 psi | 89% | 3159 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 52,997 psi | 85% | 3081 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,260 psi | 90% | 3173 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 84% | 56,362 psi | 90% | 2989 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,188 psi | 90% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,303 psi | 89% | 3045 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,361 psi | 89% | 3018 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,113 psi | 85% | 2986 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,330 psi | 86% | 2986 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,867 psi | 86% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,346 psi | 87% | 3025 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,301 psi | 85% | 3045 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,665 psi | 88% | 3009 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,158 psi | 88% | 3031 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,534 psi | 86% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,766 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,272 psi | 85% | 2936 fps | 97.2% |
| Somchem S335 | <<locked>> | 86% | 56,405 psi | 90% | 2943 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,056 psi | 87% | 2995 fps | 99.8% |
| Somchem S355 | <<locked>> | 92% | 55,492 psi | 89% | 3038 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 3107 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,212 psi | 81% | 2979 fps | 96% |
| Vihtavuori N130 | <<locked>> | 82% | 56,362 psi | 90% | 2904 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 53,867 psi | 86% | 2881 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,883 psi | 90% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,200 psi | 85% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,447 psi | 86% | 2966 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,795 psi | 88% | 3048 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 56,217 psi | 90% | 3012 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,868 psi | 88% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,722 psi | 86% | 3048 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,050 psi | 74% | 2979 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,940 psi | 88% | 3022 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,347 psi | 90% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,217 psi | 90% | 3117 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,478 psi | 60% | 2900 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,143 psi | 88% | 3038 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% | 50,865 psi | 82% | 2858 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,671 psi | 70% | 2779 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,024 psi | 82% | 2940 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 48,675 psi | 78% | 2858 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 41,031 psi | 66% | 2805 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 41,278 psi | 66% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,172 psi | 56% | 2697 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 47,079 psi | 75% | 2894 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 39,929 psi | 64% | 2730 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,168 psi | 79% | 2904 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 49,777 psi | 80% | 2887 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,960 psi | 69% | 2927 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,697 psi | 64% | 2756 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,743 psi | 69% | 2825 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,998 psi | 56% | 2707 fps | 95.1% |
| Alliant Reloder-17 | 58.9 gr | 80% | 34,461 psi | 55% | 2720 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,460 psi | 52% | 2661 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,869 psi | 61% | 2858 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,354 psi | 74% | 2897 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 39,682 psi | 64% | 2762 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 48,747 psi | 78% | 2900 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,662 psi | 81% | 2890 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,283 psi | 77% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,379 psi | 65% | 2762 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 45,832 psi | 73% | 2930 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 90% | 49,748 psi | 80% | 2956 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 47,572 psi | 76% | 2910 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,255 psi | 49% | 2543 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,729 psi | 70% | 2877 fps | 99.4% |
| Hodgdon Superformance | 71.6 gr | 92% | 49,139 psi | 79% | 3018 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 43% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,542 psi | 73% | 2854 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 47,485 psi | 76% | 2904 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,945 psi | 67% | 2769 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,382 psi | 71% | 2792 fps | 95% |
| IMR 4350 | <<locked>> | 94% | 49,037 psi | 79% | 2927 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 47,398 psi | 76% | 2877 fps | 95.8% |
| IMR 4831 | <<locked>> | 86% | 36,318 psi | 58% | 2707 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,830 psi | 70% | 2861 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 49,168 psi | 79% | 2904 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 46,586 psi | 75% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,644 psi | 75% | 2825 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 41,901 psi | 67% | 2772 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 41,727 psi | 67% | 2769 fps | 95.8% |
| Lovex S070 | <<locked>> | 90% | 44,933 psi | 72% | 2851 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 45,963 psi | 74% | 2844 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 46,325 psi | 74% | 2851 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,134 psi | 68% | 2815 fps | 98.5% |
| Norma 204 | <<locked>> | 96% | 52,808 psi | 85% | 3031 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 35,215 psi | 56% | 2694 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 41,742 psi | 67% | 2825 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 41,872 psi | 67% | 2854 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 48,950 psi | 78% | 2907 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,733 psi | 78% | 2930 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,837 psi | 85% | 2953 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 43% | 1726 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,468 psi | 70% | 2805 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,295 psi | 73% | 2936 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,651 psi | 59% | 2792 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 37,420 psi | 60% | 2772 fps | 95.6% |
| ReloadSwiss RS 70 | 65.8 gr | 88% | 39,813 psi | 64% | 2841 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 49,951 psi | 80% | 2887 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,729 psi | 70% | 2792 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,173 psi | 60% | 2700 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 48,747 psi | 78% | 2900 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,727 psi | 67% | 2769 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,586 psi | 75% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,901 psi | 67% | 2772 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 44,933 psi | 72% | 2851 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,232 psi | 61% | 2753 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,442 psi | 76% | 2881 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,513 psi | 73% | 2861 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,195 psi | 76% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,421 psi | 63% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,818 psi | 75% | 2822 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 46,818 psi | 75% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,166 psi | 76% | 2877 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 37,913 psi | 61% | 2707 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 27,644 psi | 44% | 2516 fps | 95.3% |
| Somchem S385 | <<locked>> | 98% | 46,847 psi | 75% | 2917 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 53,098 psi | 85% | 2858 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,558 psi | 76% | 2785 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,453 psi | 70% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,888 psi | 70% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,071 psi | 58% | 2638 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 36,883 psi | 59% | 2700 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 49,342 psi | 79% | 2900 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 42,467 psi | 68% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,230 psi | 58% | 2697 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 90% | 32,982 psi | 53% | 2684 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,995 psi | 51% | 2556 fps | 96.1% |
| Winchester 748 | <<locked>> | 80% | 49,313 psi | 79% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,050 psi | 74% | 2933 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,690 psi | 49% | 2680 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,107 psi | 72% | 2864 fps | 99.3% |
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 95 powders for .300 H&H Mag. loaded with the .308 | 150gr | Norma Kalahari. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,890 fps to 3,173 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.5 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 .300 H&H Mag. with the .308 | 150gr | Norma Kalahari 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.