Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 200gr | Sako Hammerhead bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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.
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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 2700 | <<locked>> | 82% | 55,129 psi | 88% | 2621 fps | 99.3% |
| Accurate 3100 | <<locked>> | 98% | 53,490 psi | 86% | 2671 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,868 psi | 88% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,738 psi | 89% | 2713 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,650 psi | 88% | 2808 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 55,608 psi | 89% | 2812 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 54,578 psi | 88% | 2635 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,881 psi | 85% | 2707 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 54,128 psi | 87% | 2759 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,217 psi | 60% | 2493 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,924 psi | 85% | 2703 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,637 psi | 89% | 2657 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,622 psi | 89% | 2677 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,376 psi | 90% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,867 psi | 86% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,695 psi | 89% | 2746 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,330 psi | 86% | 2756 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,940 psi | 86% | 2733 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,644 psi | 75% | 2677 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,911 psi | 86% | 2818 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,330 psi | 84% | 2740 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 56,333 psi | 90% | 2671 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,330 psi | 86% | 2756 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 55,709 psi | 89% | 2667 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,354 psi | 74% | 2621 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 82% | 53,200 psi | 85% | 2641 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,099 psi | 87% | 2713 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 53,650 psi | 86% | 2671 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 54,172 psi | 87% | 2703 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,156 psi | 85% | 2687 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,258 psi | 85% | 2644 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,832 psi | 73% | 2717 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,954 psi | 87% | 2746 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 59% | 1650 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,940 psi | 86% | 2615 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,214 psi | 85% | 2648 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,838 psi | 86% | 2641 fps | 99.5% |
| IMR 4831 | <<locked>> | 92% | 55,883 psi | 90% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,782 psi | 89% | 2694 fps | 97.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,158 psi | 88% | 2789 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 54,433 psi | 87% | 2612 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,128 psi | 87% | 2638 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,347 psi | 89% | 2680 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,645 psi | 76% | 2585 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 54,940 psi | 88% | 2661 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,853 psi | 86% | 2697 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 52,765 psi | 85% | 2776 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,331 psi | 87% | 2697 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,695 psi | 89% | 2687 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,666 psi | 89% | 2805 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 53,011 psi | 85% | 2700 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2690 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 60% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,910 psi | 85% | 2625 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,505 psi | 86% | 2726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,608 psi | 89% | 2736 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,664 psi | 86% | 2759 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,774 psi | 73% | 2713 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 56,318 psi | 90% | 2621 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 53,127 psi | 85% | 2621 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,433 psi | 87% | 2677 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 55,071 psi | 88% | 2736 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 55,709 psi | 89% | 2667 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,128 psi | 87% | 2638 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,433 psi | 87% | 2612 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,347 psi | 89% | 2680 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,433 psi | 87% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,722 psi | 86% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,447 psi | 86% | 2592 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,607 psi | 88% | 2730 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 56,376 psi | 90% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,101 psi | 90% | 2674 fps | 97.4% |
| Somchem S365 | <<locked>> | 92% | 53,809 psi | 86% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,854 psi | 90% | 2713 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 54,027 psi | 87% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,362 psi | 90% | 2690 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2690 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 55,056 psi | 88% | 2592 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,288 psi | 89% | 2697 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 52,939 psi | 85% | 2710 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,968 psi | 85% | 2766 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,660 psi | 78% | 2684 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,724 psi | 89% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,099 psi | 87% | 2713 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,617 psi | 80% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,869 psi | 90% | 2710 fps | 98.9% |
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 2700 | <<locked>> | 80% | 51,517 psi | 83% | 2569 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 31,270 psi | 50% | 2260 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,488 psi | 83% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,610 psi | 64% | 2451 fps | 99.3% |
| Accurate High Country | <<locked>> | 88% | 41,423 psi | 66% | 2572 fps | 95% |
| Accurate MAGPRO | <<locked>> | 94% | 48,428 psi | 78% | 2694 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,298 psi | 77% | 2539 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,843 psi | 65% | 2490 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 44,382 psi | 71% | 2585 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 34,940 psi | 56% | 2434 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,392 psi | 62% | 2438 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,979 psi | 79% | 2559 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,199 psi | 84% | 2628 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,450 psi | 62% | 2461 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,569 psi | 70% | 2572 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,014 psi | 61% | 2431 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,174 psi | 61% | 2477 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,253 psi | 45% | 2238 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,066 psi | 48% | 2300 fps | 95.3% |
| Alliant Reloder-26 | 59.7 gr | 80% | 30,255 psi | 49% | 2346 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 40,364 psi | 65% | 2523 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 49,429 psi | 79% | 2572 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,174 psi | 61% | 2477 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,366 psi | 70% | 2461 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 98% | 43,352 psi | 70% | 2562 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 49,661 psi | 80% | 2585 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,539 psi | 67% | 2497 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,295 psi | 71% | 2513 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 47,427 psi | 76% | 2595 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,543 psi | 75% | 2579 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,984 psi | 58% | 2359 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,768 psi | 61% | 2536 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 40,422 psi | 65% | 2513 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 44% | 1470 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,836 psi | 82% | 2569 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,914 psi | 62% | 2395 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,817 psi | 72% | 2490 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 38,087 psi | 61% | 2408 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,180 psi | 74% | 2536 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 45,150 psi | 72% | 2615 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,082 psi | 82% | 2562 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,264 psi | 68% | 2441 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 40,509 psi | 65% | 2428 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 30,647 psi | 49% | 2244 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 51,561 psi | 83% | 2615 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,205 psi | 66% | 2477 fps | 95.8% |
| Norma MRP | 60.8 gr | 84% | 34,853 psi | 56% | 2431 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,247 psi | 63% | 2444 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 80% | 52,214 psi | 84% | 2638 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 42,032 psi | 67% | 2566 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 38,029 psi | 61% | 2434 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,318 psi | 60% | 2451 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 45% | 1509 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,705 psi | 80% | 2575 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,267 psi | 74% | 2618 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,421 psi | 63% | 2470 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,116 psi | 61% | 2480 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,592 psi | 55% | 2457 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,808 psi | 85% | 2572 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,630 psi | 75% | 2526 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,409 psi | 68% | 2474 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 39,624 psi | 64% | 2467 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 43,366 psi | 70% | 2461 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,264 psi | 68% | 2441 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 51,082 psi | 82% | 2562 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,509 psi | 65% | 2428 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,703 psi | 76% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,616 psi | 76% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,481 psi | 67% | 2392 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,262 psi | 63% | 2464 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,789 psi | 75% | 2523 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,137 psi | 74% | 2516 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 35,766 psi | 57% | 2405 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,331 psi | 57% | 2349 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 44,672 psi | 72% | 2454 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,640 psi | 65% | 2441 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,188 psi | 60% | 2382 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 51,503 psi | 83% | 2543 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,030 psi | 64% | 2444 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,343 psi | 50% | 2306 fps | 97.8% |
| Vihtavuori N560 | 66.6 gr | 92% | 46,253 psi | 74% | 2651 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 45,498 psi | 73% | 2628 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,755 psi | 64% | 2415 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,539 psi | 67% | 2497 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,961 psi | 40% | 2221 fps | 97.1% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,566 psi | 63% | 2438 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 86 powders for .300 H&H Mag. loaded with the .308 | 200gr | Sako Hammerhead. Alliant Reloder-26 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,650 fps to 2,818 fps. ADI AR 2225 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, Alliant Reloder-25 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 H&H Mag. with the .308 | 200gr | 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.