Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 180gr | Sako Hammerhead 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 70, Alliant Reloder-26 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.
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>> | 82% | 54,926 psi | 88% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,101 psi | 90% | 2772 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,490 psi | 86% | 2812 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 55,085 psi | 88% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,738 psi | 89% | 2861 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,579 psi | 89% | 2949 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 55,332 psi | 89% | 2789 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,142 psi | 85% | 2848 fps | 97.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,389 psi | 87% | 2897 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,360 psi | 87% | 2907 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,287 psi | 85% | 2844 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,086 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,144 psi | 90% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,968 psi | 85% | 2864 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,230 psi | 87% | 2887 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,985 psi | 90% | 2890 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2894 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,299 psi | 81% | 2828 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,918 psi | 70% | 2756 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,940 psi | 86% | 2966 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,878 psi | 78% | 2815 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 53,374 psi | 86% | 2779 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2894 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 56,159 psi | 90% | 2812 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 53,838 psi | 86% | 2795 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,418 psi | 87% | 2858 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 54,302 psi | 87% | 2818 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 54,491 psi | 87% | 2841 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,359 psi | 86% | 2792 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,839 psi | 88% | 2825 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,476 psi | 87% | 2894 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 58% | 1742 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,579 psi | 89% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,737 psi | 88% | 2772 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,896 psi | 86% | 2753 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 53,737 psi | 86% | 2795 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,621 psi | 88% | 2789 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 56,144 psi | 90% | 2851 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,172 psi | 87% | 2808 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,115 psi | 90% | 2831 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,953 psi | 83% | 2867 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 56,173 psi | 90% | 2756 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,882 psi | 88% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,462 psi | 87% | 2785 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,680 psi | 89% | 2825 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,614 psi | 72% | 2664 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 56,362 psi | 90% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,434 psi | 89% | 2815 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,418 psi | 87% | 2841 fps | 97.8% |
| Norma MRP | <<locked>> | 98% | 52,895 psi | 85% | 2920 fps | 99% |
| Norma URP | <<locked>> | 92% | 54,433 psi | 87% | 2844 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,634 psi | 84% | 2789 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,054 psi | 83% | 2881 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 92% | 53,330 psi | 86% | 2848 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,456 psi | 74% | 2756 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 60% | 1785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,751 psi | 86% | 2776 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,693 psi | 86% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,724 psi | 89% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,099 psi | 87% | 2910 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,801 psi | 69% | 2772 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 82% | 53,476 psi | 86% | 2726 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,461 psi | 86% | 2772 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,868 psi | 88% | 2822 fps | 97% |
| Rottweil R 905 | <<locked>> | 98% | 55,317 psi | 89% | 2877 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 56,159 psi | 90% | 2812 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,462 psi | 87% | 2785 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,882 psi | 88% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,680 psi | 89% | 2825 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,013 psi | 88% | 2831 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,912 psi | 90% | 2805 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,418 psi | 87% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,273 psi | 87% | 2740 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,839 psi | 88% | 2874 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 53,417 psi | 86% | 2769 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,737 psi | 86% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,999 psi | 90% | 2854 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 53,766 psi | 86% | 2687 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,099 psi | 87% | 2703 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,650 psi | 88% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,098 psi | 85% | 2789 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,532 psi | 83% | 2772 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 55,796 psi | 89% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,854 psi | 90% | 2848 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 52,924 psi | 85% | 2854 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,301 psi | 85% | 2907 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,260 psi | 90% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,679 psi | 88% | 2864 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,513 psi | 73% | 2887 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,159 psi | 90% | 2812 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,275 psi | 90% | 2851 fps | 98.2% |
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% | 51,488 psi | 83% | 2657 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,182 psi | 79% | 2661 fps | 97.7% |
| Accurate 3100 | <<locked>> | 86% | 33,373 psi | 54% | 2428 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 48,791 psi | 78% | 2664 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,057 psi | 59% | 2526 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 51,764 psi | 83% | 2884 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 45,905 psi | 74% | 2635 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,830 psi | 70% | 2677 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 98% | 50,937 psi | 82% | 2838 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,647 psi | 81% | 2844 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,845 psi | 70% | 2674 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,514 psi | 75% | 2664 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,588 psi | 80% | 2730 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,158 psi | 58% | 2536 fps | 98.1% |
| Alliant Reloder-17 | 59.8 gr | 80% | 40,973 psi | 66% | 2664 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,337 psi | 69% | 2667 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,642 psi | 70% | 2717 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,585 psi | 43% | 2297 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,055 psi | 55% | 2523 fps | 95.8% |
| Alliant Reloder-26 | 64.3 gr | 84% | 32,358 psi | 52% | 2520 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 42,975 psi | 69% | 2703 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,717 psi | 75% | 2674 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,642 psi | 70% | 2717 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 41,089 psi | 66% | 2543 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 47,036 psi | 75% | 2680 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 39,044 psi | 63% | 2575 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 41,930 psi | 67% | 2595 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 96% | 51,053 psi | 82% | 2785 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,649 psi | 54% | 2431 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,271 psi | 82% | 2772 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 37,956 psi | 61% | 2579 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 44% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,243 psi | 84% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,269 psi | 77% | 2667 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,662 psi | 81% | 2700 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 39,276 psi | 63% | 2526 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,525 psi | 68% | 2572 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 35,621 psi | 57% | 2484 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 50,850 psi | 82% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,603 psi | 80% | 2723 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 48,443 psi | 78% | 2805 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 53,055 psi | 85% | 2707 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,675 psi | 78% | 2667 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,190 psi | 64% | 2526 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 38,406 psi | 62% | 2507 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 34,519 psi | 55% | 2457 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,982 psi | 85% | 2726 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,936 psi | 78% | 2717 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,440 psi | 71% | 2667 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 37,376 psi | 60% | 2612 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,912 psi | 59% | 2523 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,197 psi | 79% | 2736 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,646 psi | 78% | 2818 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 35,810 psi | 57% | 2510 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 40,234 psi | 65% | 2631 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 44% | 1594 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,152 psi | 76% | 2664 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,526 psi | 70% | 2717 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,753 psi | 59% | 2543 fps | 97.6% |
| ReloadSwiss RS 70 | 60.7 gr | 80% | 35,737 psi | 57% | 2549 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,813 psi | 64% | 2700 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,488 psi | 81% | 2680 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,063 psi | 71% | 2621 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,341 psi | 78% | 2710 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 42,337 psi | 68% | 2651 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 41,089 psi | 66% | 2543 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,190 psi | 64% | 2526 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 48,675 psi | 78% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,406 psi | 62% | 2507 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,194 psi | 72% | 2674 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,620 psi | 84% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,339 psi | 73% | 2530 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,189 psi | 63% | 2470 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,989 psi | 67% | 2644 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 44,440 psi | 71% | 2618 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 33,373 psi | 54% | 2480 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,408 psi | 65% | 2582 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 50,633 psi | 81% | 2644 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,821 psi | 81% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,366 psi | 68% | 2549 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,276 psi | 61% | 2523 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 39,610 psi | 64% | 2556 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,979 psi | 79% | 2651 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,681 psi | 60% | 2523 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 29,167 psi | 47% | 2372 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 49,777 psi | 80% | 2844 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,376 psi | 60% | 2493 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 39,044 psi | 63% | 2575 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,961 psi | 40% | 2316 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,562 psi | 84% | 2759 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,467 psi | 68% | 2618 fps | 95.1% |
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 | 180gr | Sako Hammerhead. Alliant Reloder-26 delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,966 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 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, Alliant Reloder-17 rank at the top here: for .300 H&H Mag. with the .308 | 180gr | Sako Hammerhead 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.