Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 181gr | RWS H-Mantel bullet and 94 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-26 and Hodgdon Superformance.
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% | 54,070 psi | 87% | 2680 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,274 psi | 89% | 2746 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,779 psi | 85% | 2789 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,549 psi | 87% | 2736 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,143 psi | 88% | 2841 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 53,853 psi | 86% | 2927 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 86% | 54,650 psi | 88% | 2766 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,999 psi | 90% | 2881 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,809 psi | 86% | 2874 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,664 psi | 86% | 2884 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,115 psi | 90% | 2877 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,405 psi | 89% | 2792 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,680 psi | 89% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,840 psi | 90% | 2894 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,359 psi | 86% | 2867 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,317 psi | 89% | 2867 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,533 psi | 84% | 2871 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,574 psi | 79% | 2808 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,134 psi | 69% | 2726 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,026 psi | 85% | 2943 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,022 psi | 77% | 2789 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 56,144 psi | 90% | 2805 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,533 psi | 84% | 2871 fps | 97.8% |
| Bofors RP7 | <<locked>> | 90% | 55,593 psi | 89% | 2789 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 53,200 psi | 85% | 2772 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 53,606 psi | 86% | 2835 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 53,708 psi | 86% | 2799 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 53,853 psi | 86% | 2818 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,101 psi | 90% | 2818 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,172 psi | 87% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,795 psi | 86% | 2871 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 58% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,114 psi | 88% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,273 psi | 87% | 2753 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,229 psi | 85% | 2730 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 56,420 psi | 90% | 2822 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,041 psi | 87% | 2769 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 55,593 psi | 89% | 2835 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,650 psi | 86% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,506 psi | 89% | 2808 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2841 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 55,695 psi | 89% | 2736 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,389 psi | 87% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,882 psi | 86% | 2762 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 55,143 psi | 88% | 2805 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,874 psi | 70% | 2641 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 55,579 psi | 89% | 2753 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,260 psi | 90% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,984 psi | 88% | 2799 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,664 psi | 86% | 2818 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 55,869 psi | 90% | 2956 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 53,853 psi | 86% | 2825 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,579 psi | 89% | 2822 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,213 psi | 82% | 2851 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 56,043 psi | 90% | 2877 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,759 psi | 73% | 2733 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 59% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,156 psi | 85% | 2756 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,808 psi | 85% | 2858 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,940 psi | 88% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,432 psi | 86% | 2890 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,018 psi | 67% | 2740 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 56,434 psi | 90% | 2756 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,246 psi | 90% | 2802 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,404 psi | 87% | 2799 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 54,592 psi | 88% | 2854 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 55,593 psi | 89% | 2789 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,882 psi | 86% | 2762 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 54,389 psi | 87% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,143 psi | 88% | 2805 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,404 psi | 87% | 2812 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,521 psi | 89% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,983 psi | 87% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,490 psi | 86% | 2717 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,114 psi | 87% | 2851 fps | 98% |
| Somchem S335 | <<locked>> | 82% | 56,115 psi | 90% | 2684 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,391 psi | 90% | 2799 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,057 psi | 90% | 2792 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 52,881 psi | 85% | 2828 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,361 psi | 89% | 2835 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 53,388 psi | 86% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,635 psi | 86% | 2687 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,027 psi | 87% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,970 psi | 90% | 2818 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,923 psi | 82% | 2749 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 55,201 psi | 89% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,071 psi | 88% | 2825 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,419 psi | 89% | 2881 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2943 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,608 psi | 89% | 2789 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,867 psi | 86% | 2838 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,730 psi | 72% | 2861 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,521 psi | 89% | 2792 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,361 psi | 89% | 2825 fps | 98% |
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% | 50,937 psi | 82% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,588 psi | 78% | 2641 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 35,157 psi | 56% | 2461 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,225 psi | 77% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,593 psi | 59% | 2510 fps | 97.9% |
| Accurate High Country | <<locked>> | 94% | 46,876 psi | 75% | 2805 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 45,411 psi | 73% | 2615 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,366 psi | 70% | 2654 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 50,386 psi | 81% | 2812 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,980 psi | 80% | 2822 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,323 psi | 69% | 2654 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,963 psi | 74% | 2641 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,095 psi | 79% | 2707 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,708 psi | 57% | 2516 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,335 psi | 65% | 2641 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,830 psi | 69% | 2648 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,975 psi | 69% | 2694 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,237 psi | 42% | 2277 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,533 psi | 54% | 2497 fps | 95.5% |
| Alliant Reloder-26 | 63.3 gr | 84% | 31,937 psi | 51% | 2500 fps | 95.7% |
| Bofors RP15 | <<locked>> | 96% | 42,380 psi | 68% | 2680 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,195 psi | 74% | 2654 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,975 psi | 69% | 2694 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 40,654 psi | 65% | 2523 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 46,586 psi | 75% | 2661 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,421 psi | 62% | 2549 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 80% | 41,524 psi | 67% | 2575 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 50,415 psi | 81% | 2759 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,344 psi | 53% | 2418 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,792 psi | 81% | 2753 fps | 100% |
| Hodgdon Superformance | 63.7 gr | 82% | 40,147 psi | 64% | 2618 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 44% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,706 psi | 83% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,761 psi | 77% | 2648 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,009 psi | 80% | 2677 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 38,870 psi | 62% | 2507 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,105 psi | 68% | 2556 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,172 psi | 56% | 2464 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 50,343 psi | 81% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,112 psi | 84% | 2756 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 47,834 psi | 77% | 2782 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 52,591 psi | 84% | 2687 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,167 psi | 77% | 2648 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,755 psi | 64% | 2510 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,942 psi | 61% | 2487 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,982 psi | 54% | 2434 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 52,431 psi | 84% | 2707 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,040 psi | 85% | 2703 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,443 psi | 78% | 2697 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,903 psi | 70% | 2648 fps | 95.3% |
| Norma MRP | <<locked>> | 90% | 39,378 psi | 63% | 2651 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,448 psi | 58% | 2503 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,544 psi | 78% | 2717 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,834 psi | 77% | 2792 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,259 psi | 57% | 2487 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 98% | 42,511 psi | 68% | 2667 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 44% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,514 psi | 75% | 2644 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,888 psi | 69% | 2694 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,318 psi | 58% | 2526 fps | 97.5% |
| ReloadSwiss RS 70 | 59.7 gr | 80% | 35,244 psi | 57% | 2523 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,189 psi | 63% | 2674 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 49,922 psi | 80% | 2661 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,555 psi | 70% | 2598 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,819 psi | 77% | 2690 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 41,814 psi | 67% | 2628 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 40,654 psi | 65% | 2523 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,755 psi | 64% | 2510 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 48,167 psi | 77% | 2648 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,942 psi | 61% | 2487 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,512 psi | 71% | 2651 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,938 psi | 83% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,817 psi | 72% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,827 psi | 62% | 2451 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,423 psi | 66% | 2621 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,982 psi | 85% | 2641 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,932 psi | 70% | 2598 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 52,446 psi | 84% | 2736 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 32,938 psi | 53% | 2461 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,914 psi | 64% | 2562 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 50,024 psi | 80% | 2625 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,314 psi | 81% | 2638 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,901 psi | 67% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,826 psi | 61% | 2503 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 41,785 psi | 67% | 2589 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,530 psi | 78% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,275 psi | 60% | 2503 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,703 psi | 46% | 2349 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 48,921 psi | 78% | 2818 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,057 psi | 59% | 2477 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,638 psi | 62% | 2556 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,281 psi | 42% | 2359 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,909 psi | 83% | 2736 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,962 psi | 72% | 2654 fps | 95.8% |
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 94 powders for .300 H&H Mag. loaded with the .308 | 181gr | RWS H-Mantel. Norma MRP delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,956 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 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 181.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 H&H Mag. with the .308 | 181gr | RWS H-Mantel 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.