Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 165gr | Barnes X BT bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 and ReloadSwiss RS 70.
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 2495 | <<locked>> | 82% | 54,505 psi | 87% | 2789 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,244 psi | 87% | 2822 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,764 psi | 83% | 2867 fps | 98.6% |
| Accurate 4064 | <<locked>> | 84% | 54,665 psi | 88% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,838 psi | 86% | 2923 fps | 99.7% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,376 psi | 89% | 3051 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 82% | 55,811 psi | 89% | 2897 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,577 psi | 86% | 2851 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 54,230 psi | 87% | 2943 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,535 psi | 89% | 3018 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,215 psi | 87% | 2943 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,172 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,505 psi | 87% | 2897 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,795 psi | 86% | 2969 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,042 psi | 88% | 3002 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,519 psi | 86% | 2936 fps | 96.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,662 psi | 81% | 2933 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,095 psi | 77% | 2884 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,366 psi | 68% | 2789 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,375 psi | 87% | 3068 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,361 psi | 89% | 2910 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 55,288 psi | 89% | 2897 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,662 psi | 81% | 2933 fps | 96.2% |
| Bofors RP7 | <<locked>> | 90% | 54,621 psi | 88% | 2867 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 86% | 55,622 psi | 89% | 2907 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 55,521 psi | 89% | 2963 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 90% | 55,390 psi | 89% | 2920 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 56,376 psi | 90% | 2907 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,114 psi | 87% | 2897 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,318 psi | 90% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,419 psi | 89% | 2995 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 58% | 1798 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,969 psi | 87% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,434 psi | 90% | 2884 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,608 psi | 89% | 2861 fps | 98.4% |
| IMR 4350 | <<locked>> | 94% | 54,969 psi | 88% | 2894 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,782 psi | 89% | 2890 fps | 98.3% |
| IMR 4831 | <<locked>> | 94% | 54,027 psi | 87% | 2910 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 55,854 psi | 90% | 2927 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,679 psi | 88% | 2818 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,722 psi | 86% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,362 psi | 90% | 2897 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 54,273 psi | 87% | 2884 fps | 98.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,381 psi | 70% | 2720 fps | 97% |
| Norma 201 | <<locked>> | 82% | 55,100 psi | 88% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,347 psi | 89% | 2841 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,824 psi | 86% | 2884 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,376 psi | 89% | 2940 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 53,679 psi | 86% | 3018 fps | 98.2% |
| Norma URP | <<locked>> | 94% | 55,637 psi | 89% | 2956 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 54,157 psi | 87% | 2907 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,215 psi | 87% | 2949 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 60% | 1844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,405 psi | 89% | 2884 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,158 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,766 psi | 88% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,243 psi | 85% | 2940 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,085 psi | 88% | 3015 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 55,651 psi | 89% | 2844 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,332 psi | 89% | 2890 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,941 psi | 90% | 2913 fps | 95.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,057 psi | 90% | 2976 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 90% | 54,621 psi | 88% | 2867 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,362 psi | 90% | 2897 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 53,722 psi | 86% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,273 psi | 87% | 2884 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,304 psi | 90% | 2943 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,215 psi | 87% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,680 psi | 89% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,188 psi | 90% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,188 psi | 90% | 2844 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,535 psi | 89% | 2969 fps | 97.2% |
| Somchem S335 | <<locked>> | 82% | 55,448 psi | 89% | 2776 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,420 psi | 90% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,361 psi | 89% | 2887 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,375 psi | 87% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,635 psi | 86% | 2900 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 82% | 55,985 psi | 90% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,767 psi | 89% | 2808 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,811 psi | 89% | 2822 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,362 psi | 90% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,244 psi | 87% | 2897 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,443 psi | 79% | 2815 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 84% | 54,186 psi | 87% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,679 psi | 86% | 2904 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2963 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,867 psi | 86% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,796 psi | 89% | 2969 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,627 psi | 70% | 2930 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,230 psi | 87% | 2877 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,330 psi | 86% | 2887 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 2495 | <<locked>> | 80% | 51,401 psi | 82% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,095 psi | 77% | 2713 fps | 96.2% |
| Accurate 3100 | <<locked>> | 90% | 37,724 psi | 60% | 2598 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 48,588 psi | 78% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,811 psi | 59% | 2595 fps | 96.8% |
| Accurate High Country | <<locked>> | 98% | 51,663 psi | 83% | 2986 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 52,721 psi | 85% | 2848 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,773 psi | 72% | 2694 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 47,993 psi | 77% | 2831 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,718 psi | 78% | 2904 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,877 psi | 77% | 2831 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,513 psi | 73% | 2730 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,428 psi | 78% | 2792 fps | 99.6% |
| Alliant Reloder-16 | 53.7 gr | 80% | 35,520 psi | 57% | 2592 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,842 psi | 64% | 2720 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 47,340 psi | 76% | 2822 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,616 psi | 76% | 2874 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,398 psi | 46% | 2411 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,608 psi | 60% | 2677 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 86% | 34,301 psi | 55% | 2638 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,156 psi | 84% | 2858 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 46,006 psi | 74% | 2743 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 47,616 psi | 76% | 2874 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 43,192 psi | 69% | 2654 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 46,238 psi | 74% | 2746 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 40,553 psi | 65% | 2680 fps | 95% |
| Hodgdon H4350 | <<locked>> | 84% | 46,325 psi | 74% | 2756 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 53,330 psi | 86% | 2858 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,330 psi | 53% | 2493 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,458 psi | 79% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,308 psi | 68% | 2746 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,427 psi | 44% | 1611 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,705 psi | 81% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,007 psi | 75% | 2730 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,313 psi | 79% | 2753 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 43,308 psi | 69% | 2680 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,655 psi | 67% | 2628 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 35,230 psi | 56% | 2546 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 49,661 psi | 80% | 2825 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 51,692 psi | 83% | 2772 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 47,790 psi | 77% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,784 psi | 64% | 2589 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 40,292 psi | 65% | 2618 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 38,580 psi | 62% | 2618 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,069 psi | 83% | 2799 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,272 psi | 84% | 2795 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,819 psi | 77% | 2779 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 48,776 psi | 78% | 2828 fps | 95.3% |
| Norma MRP | <<locked>> | 92% | 41,452 psi | 66% | 2779 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,274 psi | 58% | 2585 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,645 psi | 76% | 2799 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 39,726 psi | 64% | 2671 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 45% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,050 psi | 74% | 2720 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,677 psi | 83% | 2907 fps | 99.8% |
| ReloadSwiss RS 60 | 57.9 gr | 80% | 42,148 psi | 68% | 2779 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,969 psi | 58% | 2602 fps | 96.2% |
| ReloadSwiss RS 70 | 58.8 gr | 80% | 35,230 psi | 56% | 2598 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 49,705 psi | 80% | 2753 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,526 psi | 70% | 2690 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 52,794 psi | 85% | 2861 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 46,412 psi | 74% | 2805 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 43,192 psi | 69% | 2654 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,784 psi | 64% | 2589 fps | 96.3% |
| Shooters World Precision | <<locked>> | 80% | 47,790 psi | 77% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,292 psi | 65% | 2618 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,859 psi | 70% | 2733 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,082 psi | 82% | 2818 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,547 psi | 84% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,454 psi | 71% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,423 psi | 66% | 2582 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,023 psi | 79% | 2858 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 52,460 psi | 84% | 2733 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,069 psi | 85% | 2835 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,729 psi | 70% | 2687 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 32,938 psi | 53% | 2546 fps | 98.7% |
| Somchem S385 | <<locked>> | 92% | 44,556 psi | 71% | 2736 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,866 psi | 85% | 2717 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,574 psi | 79% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,559 psi | 79% | 2730 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,669 psi | 67% | 2618 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,579 psi | 60% | 2582 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 46,456 psi | 74% | 2762 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 48,008 psi | 77% | 2723 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,217 psi | 60% | 2585 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 30,937 psi | 50% | 2490 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,796 psi | 59% | 2552 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 40,741 psi | 65% | 2687 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,514 psi | 46% | 2493 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,995 psi | 82% | 2825 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,966 psi | 80% | 2828 fps | 95.7% |
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 91 powders for .300 H&H Mag. loaded with the .308 | 165gr | Barnes X BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,798 fps to 3,068 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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 60, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .300 H&H Mag. with the .308 | 165gr | Barnes X 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.