Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 170gr | Speer Hot-Cor bullet and 92 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-16 and Alliant Reloder-26.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 84% | 55,999 psi | 90% | 2799 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,085 psi | 87% | 2812 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,981 psi | 82% | 2841 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 56,289 psi | 90% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,359 psi | 86% | 2904 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,709 psi | 89% | 3038 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 82% | 55,463 psi | 89% | 2881 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,403 psi | 86% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,476 psi | 87% | 2940 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,985 psi | 90% | 3009 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,505 psi | 87% | 2936 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,969 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,288 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,012 psi | 87% | 2956 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,376 psi | 89% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,722 psi | 86% | 2927 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2923 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,776 psi | 77% | 2861 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,829 psi | 67% | 2772 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 3058 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,506 psi | 89% | 2900 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 54,766 psi | 88% | 2874 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2923 fps | 96.9% |
| Bofors RP7 | <<locked>> | 90% | 54,331 psi | 87% | 2854 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 55,071 psi | 88% | 2887 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,637 psi | 89% | 2953 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 55,492 psi | 89% | 2910 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,115 psi | 90% | 2890 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,389 psi | 87% | 2884 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,260 psi | 90% | 2927 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,840 psi | 90% | 2989 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,245 psi | 58% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,650 psi | 86% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,231 psi | 90% | 2871 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,376 psi | 89% | 2848 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 54,911 psi | 88% | 2884 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,927 psi | 90% | 2884 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 53,896 psi | 86% | 2894 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 55,695 psi | 89% | 2907 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,883 psi | 90% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,404 psi | 87% | 2805 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,275 psi | 90% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,695 psi | 89% | 2877 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 53,766 psi | 86% | 2864 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,279 psi | 68% | 2687 fps | 97.3% |
| Norma 201 | <<locked>> | 82% | 54,201 psi | 87% | 2822 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,013 psi | 88% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,577 psi | 86% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,724 psi | 89% | 2936 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 53,795 psi | 86% | 3005 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 55,724 psi | 89% | 2940 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,157 psi | 87% | 2890 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,462 psi | 87% | 2940 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,941 psi | 59% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,216 psi | 89% | 2874 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,911 psi | 88% | 2943 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,926 psi | 88% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,055 psi | 85% | 2923 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,521 psi | 89% | 3009 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 54,955 psi | 88% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,650 psi | 88% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,333 psi | 90% | 2910 fps | 96.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,304 psi | 90% | 2966 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 54,331 psi | 87% | 2854 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,695 psi | 89% | 2877 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,883 psi | 90% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,275 psi | 90% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,766 psi | 86% | 2864 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,376 psi | 90% | 2930 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,882 psi | 86% | 2848 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,114 psi | 88% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,999 psi | 90% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,651 psi | 89% | 2828 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2959 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 54,766 psi | 88% | 2753 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,621 psi | 88% | 2864 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,795 psi | 88% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,417 psi | 86% | 2887 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 55,564 psi | 89% | 2740 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,216 psi | 89% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,535 psi | 89% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,941 psi | 90% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,404 psi | 87% | 2884 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,342 psi | 79% | 2805 fps | 97% |
| Vihtavuori N540 | <<locked>> | 84% | 53,824 psi | 86% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,447 psi | 86% | 2887 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,577 psi | 86% | 2943 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,012 psi | 87% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,898 psi | 90% | 2956 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,120 psi | 69% | 2907 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,027 psi | 87% | 2861 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,606 psi | 86% | 2881 fps | 97.2% |
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% | 49,443 psi | 79% | 2707 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,413 psi | 76% | 2697 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 36,158 psi | 58% | 2559 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 46,833 psi | 75% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,273 psi | 57% | 2556 fps | 96.9% |
| Accurate High Country | <<locked>> | 96% | 48,370 psi | 78% | 2913 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 52,156 psi | 84% | 2828 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,280 psi | 71% | 2677 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 47,732 psi | 77% | 2822 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,457 psi | 78% | 2884 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,875 psi | 72% | 2762 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,701 psi | 72% | 2703 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,718 psi | 77% | 2772 fps | 99.7% |
| Alliant Reloder-16 | 55.7 gr | 80% | 34,679 psi | 56% | 2566 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,117 psi | 63% | 2694 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,324 psi | 71% | 2756 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,454 psi | 71% | 2802 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,674 psi | 46% | 2421 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,563 psi | 55% | 2592 fps | 95.1% |
| Alliant Reloder-26 | 66.1 gr | 86% | 33,054 psi | 53% | 2598 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,750 psi | 83% | 2841 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 44,788 psi | 72% | 2713 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,454 psi | 71% | 2802 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 42,134 psi | 68% | 2631 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 45,194 psi | 72% | 2720 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 39,958 psi | 64% | 2661 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 43,091 psi | 69% | 2684 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,736 psi | 85% | 2838 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,126 psi | 52% | 2461 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,168 psi | 79% | 2815 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,887 psi | 67% | 2733 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 43% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,430 psi | 81% | 2785 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,572 psi | 75% | 2710 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,979 psi | 79% | 2740 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 42,699 psi | 68% | 2664 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,031 psi | 66% | 2608 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 33,997 psi | 55% | 2510 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 48,936 psi | 78% | 2799 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,228 psi | 84% | 2802 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,155 psi | 82% | 2753 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,702 psi | 75% | 2710 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,682 psi | 62% | 2562 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 39,262 psi | 63% | 2592 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 37,202 psi | 60% | 2582 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 51,155 psi | 82% | 2776 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,692 psi | 83% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,079 psi | 75% | 2756 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,542 psi | 73% | 2756 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 40,770 psi | 65% | 2756 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 35,273 psi | 57% | 2552 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,137 psi | 76% | 2776 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,463 psi | 58% | 2589 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 44% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,382 psi | 73% | 2700 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,430 psi | 82% | 2890 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,568 psi | 67% | 2753 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,911 psi | 56% | 2569 fps | 96.4% |
| ReloadSwiss RS 70 | 60.9 gr | 80% | 34,214 psi | 55% | 2569 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 48,544 psi | 78% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,235 psi | 68% | 2657 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 49,603 psi | 80% | 2799 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 46,209 psi | 74% | 2792 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 82% | 42,134 psi | 68% | 2631 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,682 psi | 62% | 2562 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,228 psi | 84% | 2802 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,702 psi | 75% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,262 psi | 63% | 2592 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,323 psi | 69% | 2710 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,720 psi | 81% | 2799 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,953 psi | 83% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,772 psi | 70% | 2579 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,422 psi | 65% | 2559 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,788 psi | 73% | 2785 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 51,764 psi | 83% | 2710 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,728 psi | 69% | 2661 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 31,763 psi | 51% | 2510 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 41,104 psi | 66% | 2661 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 52,446 psi | 84% | 2697 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,718 psi | 78% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,008 psi | 79% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,712 psi | 65% | 2589 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,608 psi | 59% | 2556 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 43,091 psi | 69% | 2690 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,195 psi | 76% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,042 psi | 58% | 2552 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 29,530 psi | 47% | 2444 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,839 psi | 57% | 2523 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 39,958 psi | 64% | 2661 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,122 psi | 43% | 2451 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,531 psi | 81% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,615 psi | 75% | 2762 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 92 powders for .300 H&H Mag. loaded with the .308 | 170gr | Speer Hot-Cor. Alliant Reloder-26 delivers the highest muzzle velocity at 3,058 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,058 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 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 170.0 gr projectile in 0.308" calls for a 1:14.5 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 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for .300 H&H Mag. with the .308 | 170gr | Speer Hot-Cor 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.