Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 165gr | Barnes BND SPIT-FIRE 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, Alliant Reloder-17 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% | 56,014 psi | 90% | 2792 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,216 psi | 89% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,679 psi | 86% | 2822 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,079 psi | 74% | 2782 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 55,317 psi | 89% | 2867 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,724 psi | 89% | 2966 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,027 psi | 88% | 2897 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,217 psi | 90% | 2900 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,505 psi | 86% | 2936 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,012 psi | 87% | 2844 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,332 psi | 89% | 2822 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,085 psi | 88% | 3022 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,258 psi | 85% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,592 psi | 86% | 2894 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,069 psi | 85% | 2966 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,114 psi | 87% | 2995 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2923 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,439 psi | 70% | 2808 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,066 psi | 79% | 2986 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,085 psi | 88% | 2913 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 53,780 psi | 86% | 2887 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,679 psi | 86% | 2861 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,361 psi | 89% | 2825 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,548 psi | 86% | 2874 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,389 psi | 87% | 2900 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 54,621 psi | 88% | 2956 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 54,766 psi | 88% | 2917 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 84% | 55,651 psi | 89% | 2907 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,823 psi | 85% | 2887 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,608 psi | 89% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,795 psi | 88% | 2989 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 58% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,519 psi | 86% | 2858 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,999 psi | 90% | 2887 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,724 psi | 89% | 2884 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,434 psi | 89% | 2864 fps | 98.3% |
| IMR 4350 | <<locked>> | 96% | 54,128 psi | 87% | 2887 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,390 psi | 89% | 2890 fps | 98.2% |
| IMR 4831 | <<locked>> | 98% | 56,043 psi | 90% | 2953 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 54,984 psi | 88% | 2923 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,012 psi | 87% | 2844 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,303 psi | 89% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,389 psi | 87% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,622 psi | 89% | 2877 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,027 psi | 88% | 2884 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 56,028 psi | 90% | 2923 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 53,896 psi | 86% | 2841 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,476 psi | 87% | 2841 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,159 psi | 90% | 2930 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,824 psi | 88% | 2936 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 48,675 psi | 78% | 2940 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 54,302 psi | 87% | 2943 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 53,359 psi | 86% | 2904 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,287 psi | 85% | 2943 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 54,027 psi | 87% | 2864 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,983 psi | 87% | 2884 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 58% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,520 psi | 87% | 2881 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,128 psi | 87% | 2959 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,824 psi | 86% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,434 psi | 89% | 2986 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,433 psi | 87% | 3009 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,810 psi | 88% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,505 psi | 87% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,664 psi | 86% | 2881 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,271 psi | 82% | 2904 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 92% | 53,679 psi | 86% | 2861 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,027 psi | 88% | 2884 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,303 psi | 89% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,622 psi | 89% | 2877 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,028 psi | 90% | 2923 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,448 psi | 89% | 2943 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,663 psi | 84% | 2841 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,606 psi | 86% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,984 psi | 88% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,651 psi | 89% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,042 psi | 88% | 2838 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2897 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 54,621 psi | 88% | 2776 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,144 psi | 90% | 2890 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,041 psi | 87% | 2881 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,663 psi | 84% | 2946 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,127 psi | 84% | 2884 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 55,332 psi | 89% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,389 psi | 87% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,129 psi | 88% | 2822 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,361 psi | 89% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,258 psi | 85% | 2890 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,433 psi | 87% | 2844 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,330 psi | 86% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,970 psi | 90% | 2949 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,225 psi | 77% | 2887 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,055 psi | 85% | 2864 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,723 psi | 88% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,621 psi | 88% | 2956 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,073 psi | 63% | 2831 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,476 psi | 86% | 2874 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% | 52,649 psi | 84% | 2746 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,600 psi | 73% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,179 psi | 71% | 2651 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 37,420 psi | 60% | 2612 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,149 psi | 69% | 2677 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,301 psi | 55% | 2556 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,530 psi | 78% | 2789 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,234 psi | 66% | 2635 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 50,009 psi | 80% | 2874 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,604 psi | 81% | 2792 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,851 psi | 83% | 2772 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,773 psi | 72% | 2838 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,220 psi | 66% | 2661 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,179 psi | 71% | 2726 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,084 psi | 55% | 2566 fps | 95.9% |
| Alliant Reloder-17 | 56.8 gr | 80% | 35,868 psi | 58% | 2641 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,211 psi | 79% | 2867 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,762 psi | 48% | 2474 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,476 psi | 55% | 2657 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,964 psi | 77% | 2795 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,205 psi | 66% | 2671 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,469 psi | 71% | 2694 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,170 psi | 84% | 2779 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,169 psi | 80% | 2822 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,858 psi | 67% | 2674 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 41,756 psi | 67% | 2723 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 48,283 psi | 77% | 2802 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,066 psi | 79% | 2802 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,573 psi | 47% | 2411 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,281 psi | 73% | 2776 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,179 psi | 71% | 2795 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 43% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,123 psi | 76% | 2753 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,226 psi | 79% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,337 psi | 69% | 2671 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,876 psi | 74% | 2697 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 44,947 psi | 72% | 2726 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,424 psi | 70% | 2677 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 33,156 psi | 53% | 2513 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 45,295 psi | 73% | 2756 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,604 psi | 81% | 2792 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,341 psi | 78% | 2769 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,225 psi | 77% | 2723 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,569 psi | 70% | 2677 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,145 psi | 61% | 2569 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 41,176 psi | 66% | 2654 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,718 psi | 77% | 2743 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,935 psi | 77% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,555 psi | 70% | 2713 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 51,213 psi | 82% | 2877 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 42,540 psi | 68% | 2812 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 34,461 psi | 55% | 2559 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 43,497 psi | 70% | 2733 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,290 psi | 61% | 2654 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,720 psi | 81% | 2808 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,372 psi | 81% | 2825 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 44% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,090 psi | 67% | 2654 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,152 psi | 76% | 2841 fps | 99.4% |
| ReloadSwiss RS 60 | 56.8 gr | 80% | 38,159 psi | 61% | 2707 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,910 psi | 54% | 2569 fps | 95.2% |
| ReloadSwiss RS 70 | 60.5 gr | 84% | 36,027 psi | 58% | 2631 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,605 psi | 83% | 2776 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,368 psi | 73% | 2690 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,711 psi | 62% | 2612 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 48,037 psi | 77% | 2848 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 44,469 psi | 71% | 2694 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,145 psi | 61% | 2569 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,341 psi | 78% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,569 psi | 70% | 2677 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,176 psi | 66% | 2654 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,784 psi | 64% | 2664 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,298 psi | 79% | 2785 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,123 psi | 76% | 2759 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,747 psi | 78% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,828 psi | 65% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,540 psi | 68% | 2618 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,572 psi | 76% | 2841 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 48,501 psi | 78% | 2687 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,849 psi | 78% | 2776 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,537 psi | 63% | 2618 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 28,877 psi | 46% | 2451 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 45,818 psi | 73% | 2776 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 49,153 psi | 79% | 2674 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,150 psi | 72% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,455 psi | 73% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,478 psi | 60% | 2549 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,518 psi | 54% | 2503 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 50,894 psi | 82% | 2789 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,918 psi | 70% | 2667 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,389 psi | 57% | 2559 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 32,474 psi | 52% | 2556 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,098 psi | 53% | 2474 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 51,169 psi | 82% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,959 psi | 67% | 2726 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,166 psi | 45% | 2497 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,862 psi | 75% | 2766 fps | 99.8% |
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 .300 H&H Mag. loaded with the .308 | 165gr | Barnes BND SPIT-FIRE. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,022 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 (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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-17, ReloadSwiss RS 60 rank at the top here: for .300 H&H Mag. with the .308 | 165gr | Barnes BND SPIT-FIRE 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.