Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 168gr | Barnes TAC-TX BT bullet and 98 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% | 54,810 psi | 88% | 2756 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,548 psi | 86% | 2776 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,635 psi | 86% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,809 psi | 86% | 2789 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,570 psi | 71% | 2736 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 53,809 psi | 86% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,085 psi | 87% | 2917 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 54,099 psi | 87% | 2861 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,448 psi | 89% | 2864 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,388 psi | 84% | 2897 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,113 psi | 85% | 2812 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,259 psi | 87% | 2782 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,114 psi | 87% | 2982 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,419 psi | 89% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,999 psi | 90% | 2910 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,535 psi | 89% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,098 psi | 85% | 2959 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,430 psi | 82% | 2884 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,424 psi | 68% | 2769 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,834 psi | 77% | 2943 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,070 psi | 87% | 2877 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 56,188 psi | 90% | 2900 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,956 psi | 90% | 2874 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,505 psi | 87% | 2792 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,246 psi | 90% | 2894 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,447 psi | 86% | 2864 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 92% | 54,911 psi | 88% | 2943 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 96% | 55,390 psi | 89% | 2904 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 54,665 psi | 88% | 2871 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,332 psi | 89% | 2904 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,766 psi | 88% | 2910 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,737 psi | 86% | 2953 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 57% | 1765 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,027 psi | 88% | 2861 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 53,563 psi | 86% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,070 psi | 87% | 2838 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,388 psi | 86% | 2808 fps | 98% |
| IMR 4350 | <<locked>> | 96% | 53,229 psi | 85% | 2851 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,476 psi | 87% | 2854 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,025 psi | 83% | 2871 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 53,751 psi | 86% | 2881 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,113 psi | 85% | 2812 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,925 psi | 86% | 2835 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,563 psi | 86% | 2789 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,607 psi | 88% | 2841 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,867 psi | 86% | 2844 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 54,882 psi | 88% | 2881 fps | 98.5% |
| Norma 201 | <<locked>> | 86% | 56,188 psi | 90% | 2854 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,461 psi | 86% | 2805 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,245 psi | 89% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,650 psi | 86% | 2897 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 47,514 psi | 76% | 2894 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 53,214 psi | 85% | 2907 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 55,970 psi | 90% | 2920 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,753 psi | 89% | 2959 fps | 99.1% |
| Ramshot TAC | <<locked>> | 82% | 53,243 psi | 85% | 2831 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,881 psi | 85% | 2844 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 58% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,737 psi | 86% | 2848 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,910 psi | 85% | 2917 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,808 psi | 85% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,070 psi | 87% | 2943 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,272 psi | 85% | 2969 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 53,417 psi | 86% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,345 psi | 86% | 2805 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,057 psi | 90% | 2894 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,256 psi | 81% | 2867 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 94% | 55,956 psi | 90% | 2874 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,867 psi | 86% | 2844 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,925 psi | 86% | 2835 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,607 psi | 88% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,882 psi | 88% | 2881 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,404 psi | 87% | 2904 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,317 psi | 89% | 2861 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,057 psi | 90% | 2884 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,302 psi | 87% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,549 psi | 87% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,940 psi | 86% | 2799 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,792 psi | 80% | 2861 fps | 96% |
| Somchem S335 | <<locked>> | 84% | 53,650 psi | 86% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,085 psi | 88% | 2854 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,159 psi | 90% | 2890 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2963 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,850 psi | 82% | 2844 fps | 97.1% |
| Unknown powder | <<locked>> | 94% | 54,288 psi | 87% | 2917 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 84% | 54,694 psi | 88% | 2730 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,287 psi | 85% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,012 psi | 87% | 2785 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,244 psi | 87% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,695 psi | 89% | 2904 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 53,476 psi | 86% | 2808 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,767 psi | 89% | 2831 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,679 psi | 88% | 2907 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,978 psi | 75% | 2844 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,854 psi | 90% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,911 psi | 88% | 2943 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,884 psi | 61% | 2785 fps | 99.7% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,287 psi | 85% | 2867 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% | 51,445 psi | 82% | 2707 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,903 psi | 70% | 2631 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,024 psi | 80% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,063 psi | 71% | 2625 fps | 95.2% |
| Accurate 3100 | <<locked>> | 96% | 38,595 psi | 62% | 2618 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 41,597 psi | 67% | 2628 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,040 psi | 53% | 2510 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 47,529 psi | 76% | 2753 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,524 psi | 65% | 2602 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 49,095 psi | 79% | 2838 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,676 psi | 80% | 2756 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,734 psi | 81% | 2736 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,685 psi | 70% | 2792 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,350 psi | 65% | 2625 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,120 psi | 69% | 2687 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,170 psi | 53% | 2526 fps | 95.7% |
| Alliant Reloder-17 | 56.1 gr | 80% | 34,751 psi | 56% | 2595 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,269 psi | 77% | 2828 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,805 psi | 46% | 2428 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 92% | 35,781 psi | 57% | 2677 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,108 psi | 76% | 2762 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 39,929 psi | 64% | 2625 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 43,497 psi | 70% | 2657 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,285 psi | 82% | 2743 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,892 psi | 78% | 2782 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,741 psi | 65% | 2631 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 84% | 41,466 psi | 66% | 2697 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 90% | 45,948 psi | 74% | 2740 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 47,993 psi | 77% | 2762 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,558 psi | 46% | 2369 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,742 psi | 67% | 2687 fps | 99.6% |
| Hodgdon Superformance | 65.3 gr | 88% | 43,250 psi | 69% | 2759 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 42% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,743 psi | 69% | 2651 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 44,019 psi | 71% | 2684 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,697 psi | 64% | 2579 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 41,713 psi | 67% | 2595 fps | 95.4% |
| IMR 4350 | <<locked>> | 90% | 43,947 psi | 70% | 2687 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,409 psi | 68% | 2638 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 33,069 psi | 53% | 2493 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 44,193 psi | 71% | 2717 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 49,676 psi | 80% | 2756 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,152 psi | 76% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,369 psi | 76% | 2687 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 42,424 psi | 68% | 2638 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,072 psi | 59% | 2526 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 39,958 psi | 64% | 2608 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 46,514 psi | 75% | 2703 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,079 psi | 75% | 2707 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,482 psi | 68% | 2674 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 50,024 psi | 80% | 2838 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 41,336 psi | 66% | 2769 fps | 95% |
| Norma URP | <<locked>> | 82% | 33,431 psi | 54% | 2516 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 42,395 psi | 68% | 2694 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 39,813 psi | 64% | 2671 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 49,676 psi | 80% | 2769 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,487 psi | 79% | 2789 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,919 psi | 43% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,162 psi | 66% | 2618 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,122 psi | 74% | 2802 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,072 psi | 59% | 2661 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,837 psi | 53% | 2526 fps | 95% |
| ReloadSwiss RS 70 | 59.9 gr | 84% | 35,143 psi | 56% | 2592 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 50,459 psi | 81% | 2736 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,121 psi | 71% | 2651 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 37,463 psi | 60% | 2569 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 47,007 psi | 75% | 2808 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 43,497 psi | 70% | 2657 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,072 psi | 59% | 2526 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,152 psi | 76% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,424 psi | 68% | 2638 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 39,958 psi | 64% | 2608 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,798 psi | 62% | 2625 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,037 psi | 77% | 2743 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,209 psi | 74% | 2723 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,688 psi | 76% | 2648 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,856 psi | 64% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,524 psi | 67% | 2582 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,557 psi | 75% | 2802 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 47,413 psi | 76% | 2648 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,935 psi | 77% | 2740 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 38,348 psi | 61% | 2575 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 27,789 psi | 45% | 2402 fps | 96.8% |
| Somchem S385 | <<locked>> | 96% | 44,469 psi | 71% | 2730 fps | 95.5% |
| Unknown powder | <<locked>> | 82% | 36,361 psi | 58% | 2575 fps | 95.9% |
| Vihtavuori N133 | <<locked>> | 80% | 48,167 psi | 77% | 2638 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,947 psi | 70% | 2628 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,425 psi | 71% | 2638 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,390 psi | 58% | 2507 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 32,518 psi | 52% | 2461 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 49,937 psi | 80% | 2756 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,931 psi | 69% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,360 psi | 55% | 2520 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 31,154 psi | 50% | 2503 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,256 psi | 52% | 2438 fps | 97.4% |
| Winchester 760 | <<locked>> | 84% | 41,466 psi | 66% | 2697 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,964 psi | 46% | 2513 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,501 psi | 79% | 2808 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 98 powders for .300 H&H Mag. loaded with the .308 | 168gr | Barnes TAC-TX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,982 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,982 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 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 168.0 gr projectile in 0.308" calls for a 1:10.5 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 H&H Mag. with the .308 | 168gr | Barnes TAC-TX BT 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.