Load Specifications
Load data in caliber .300 H&H Mag. with .310 | 200gr | Rhino Solid Shank bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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% | 54,331 psi | 87% | 2605 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,260 psi | 90% | 2707 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,157 psi | 87% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,868 psi | 88% | 2700 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 53,650 psi | 86% | 2789 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 54,621 psi | 88% | 2792 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 53,954 psi | 87% | 2621 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,477 psi | 89% | 2743 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 53,200 psi | 85% | 2736 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,579 psi | 59% | 2470 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,753 psi | 89% | 2740 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,708 psi | 88% | 2641 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,940 psi | 88% | 2661 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,463 psi | 89% | 2749 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,968 psi | 85% | 2717 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,984 psi | 88% | 2733 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,043 psi | 90% | 2792 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2717 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,035 psi | 74% | 2661 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,837 psi | 85% | 2799 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,343 psi | 82% | 2720 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 55,666 psi | 89% | 2657 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,043 psi | 90% | 2792 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 54,940 psi | 88% | 2648 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,600 psi | 73% | 2602 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 84% | 55,854 psi | 90% | 2674 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,272 psi | 85% | 2694 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 53,040 psi | 85% | 2657 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 53,258 psi | 85% | 2684 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,898 psi | 90% | 2723 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,782 psi | 89% | 2674 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,020 psi | 72% | 2697 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 53,214 psi | 85% | 2730 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 59% | 1644 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,519 psi | 86% | 2605 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,869 psi | 90% | 2638 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 55,898 psi | 90% | 2684 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,069 psi | 85% | 2621 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 55,042 psi | 88% | 2687 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,347 psi | 90% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,853 psi | 88% | 2674 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,215 psi | 87% | 2766 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 53,751 psi | 86% | 2598 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,345 psi | 86% | 2621 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,592 psi | 88% | 2664 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,847 psi | 75% | 2569 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 54,273 psi | 87% | 2648 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,084 psi | 85% | 2680 fps | 98.4% |
| Norma MRP | <<locked>> | 98% | 55,695 psi | 89% | 2815 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 53,447 psi | 86% | 2680 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,042 psi | 88% | 2674 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2785 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 92% | 55,709 psi | 89% | 2736 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,849 psi | 78% | 2667 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 60% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,796 psi | 89% | 2664 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,260 psi | 90% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,505 psi | 87% | 2717 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,895 psi | 85% | 2746 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,846 psi | 72% | 2690 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 82% | 55,579 psi | 89% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,796 psi | 89% | 2654 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,722 psi | 86% | 2661 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 54,288 psi | 87% | 2720 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 54,940 psi | 88% | 2648 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,345 psi | 86% | 2621 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 53,751 psi | 86% | 2598 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,592 psi | 88% | 2664 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,795 psi | 86% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,405 psi | 90% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,217 psi | 90% | 2628 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,809 psi | 86% | 2713 fps | 98.8% |
| Somchem S355 | <<locked>> | 86% | 55,767 psi | 89% | 2651 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,259 psi | 89% | 2657 fps | 97.1% |
| Somchem S365 | <<locked>> | 92% | 52,895 psi | 85% | 2684 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,897 psi | 88% | 2697 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 82% | 56,159 psi | 90% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,144 psi | 90% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 53,403 psi | 86% | 2579 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,564 psi | 89% | 2677 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,041 psi | 87% | 2671 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 54,215 psi | 87% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,520 psi | 87% | 2680 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,448 psi | 89% | 2743 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,898 psi | 90% | 2808 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,790 psi | 77% | 2667 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,984 psi | 88% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,272 psi | 85% | 2694 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,399 psi | 78% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,911 psi | 88% | 2690 fps | 98.7% |
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% | 50,981 psi | 82% | 2552 fps | 98.7% |
| Accurate 3100 | <<locked>> | 82% | 30,705 psi | 49% | 2244 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 50,749 psi | 81% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,957 psi | 62% | 2438 fps | 99.1% |
| Accurate High Country | 64.3 gr | 90% | 43,743 psi | 70% | 2618 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 94% | 47,485 psi | 76% | 2674 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 47,645 psi | 76% | 2526 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,118 psi | 64% | 2470 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 94% | 46,528 psi | 75% | 2625 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 98% | 34,330 psi | 55% | 2415 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,263 psi | 65% | 2474 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,283 psi | 77% | 2546 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,503 psi | 83% | 2612 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,826 psi | 61% | 2444 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,931 psi | 69% | 2559 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,842 psi | 64% | 2467 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,234 psi | 65% | 2520 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,789 psi | 45% | 2221 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,488 psi | 50% | 2336 fps | 95.9% |
| Alliant Reloder-26 | 58.8 gr | 80% | 29,646 psi | 48% | 2326 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 39,697 psi | 64% | 2507 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 48,733 psi | 78% | 2559 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,234 psi | 65% | 2520 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,786 psi | 69% | 2444 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 42,583 psi | 68% | 2543 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 49,008 psi | 79% | 2572 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 40,944 psi | 66% | 2480 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 43,700 psi | 70% | 2497 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 46,543 psi | 75% | 2572 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 45,658 psi | 73% | 2556 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,534 psi | 57% | 2346 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,523 psi | 63% | 2575 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,769 psi | 64% | 2493 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 44% | 1463 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,111 psi | 80% | 2552 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,460 psi | 84% | 2589 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 38,392 psi | 62% | 2379 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,222 psi | 71% | 2474 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 37,492 psi | 60% | 2392 fps | 98.9% |
| IMR 4895 | <<locked>> | 80% | 52,852 psi | 85% | 2635 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,527 psi | 73% | 2520 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 44,512 psi | 71% | 2598 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 50,618 psi | 81% | 2552 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,669 psi | 67% | 2425 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 39,943 psi | 64% | 2411 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 31,966 psi | 51% | 2274 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 50,865 psi | 82% | 2598 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,480 psi | 65% | 2461 fps | 95.5% |
| Norma MRP | 60 gr | 84% | 34,374 psi | 55% | 2415 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 38,595 psi | 62% | 2428 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 51,372 psi | 82% | 2625 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,367 psi | 71% | 2608 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,434 psi | 60% | 2418 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 36,579 psi | 59% | 2431 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 45% | 1503 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,892 psi | 78% | 2559 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,629 psi | 73% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,798 psi | 62% | 2454 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,434 psi | 60% | 2464 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,405 psi | 58% | 2497 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 52,388 psi | 84% | 2562 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,905 psi | 74% | 2510 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,541 psi | 71% | 2510 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 39,044 psi | 63% | 2451 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 42,786 psi | 69% | 2444 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,669 psi | 67% | 2425 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 50,618 psi | 81% | 2552 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,943 psi | 64% | 2411 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,050 psi | 75% | 2562 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,137 psi | 76% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,930 psi | 66% | 2379 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,682 psi | 62% | 2448 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 46,122 psi | 74% | 2507 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,501 psi | 78% | 2552 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 35,143 psi | 56% | 2388 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 37,173 psi | 60% | 2385 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 52,823 psi | 85% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,649 psi | 84% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,048 psi | 71% | 2441 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,030 psi | 64% | 2428 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 36,521 psi | 59% | 2365 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 50,894 psi | 82% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,450 psi | 63% | 2428 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 30,893 psi | 50% | 2293 fps | 97.6% |
| Vihtavuori N560 | <<locked>> | 92% | 45,556 psi | 73% | 2635 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 98% | 44,599 psi | 72% | 2608 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,059 psi | 63% | 2398 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 40,944 psi | 66% | 2480 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,555 psi | 39% | 2201 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 88% | 38,943 psi | 62% | 2421 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 90 powders for .300 H&H Mag. loaded with the .310 | 200gr | Rhino Solid Shank. Norma MRP delivers the highest muzzle velocity at 2,815 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,815 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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 0.31" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2225, 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for .300 H&H Mag. with the .310 | 200gr | Rhino Solid Shank 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.