Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 200gr | Barnes X S bullet and 84 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 55,680 psi | 89% | 2592 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 54,563 psi | 87% | 2654 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 53,113 psi | 85% | 2644 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,853 psi | 88% | 2782 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 98% | 55,477 psi | 89% | 2776 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 55,027 psi | 88% | 2608 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,318 psi | 90% | 2726 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 54,099 psi | 87% | 2723 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,130 psi | 61% | 2477 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,084 psi | 85% | 2671 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,217 psi | 90% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,420 psi | 90% | 2651 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,098 psi | 85% | 2687 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,099 psi | 87% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,941 psi | 90% | 2717 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,447 psi | 86% | 2726 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,099 psi | 87% | 2710 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,137 psi | 76% | 2651 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,998 psi | 87% | 2792 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,446 psi | 84% | 2710 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 53,882 psi | 86% | 2605 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,447 psi | 86% | 2726 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 56,130 psi | 90% | 2635 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,702 psi | 75% | 2589 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 82% | 53,867 psi | 86% | 2615 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,346 psi | 87% | 2684 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 53,998 psi | 87% | 2641 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 54,360 psi | 87% | 2671 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,040 psi | 85% | 2651 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,606 psi | 86% | 2618 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,209 psi | 74% | 2690 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 53,998 psi | 87% | 2717 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 59% | 1624 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,621 psi | 88% | 2589 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,563 psi | 86% | 2618 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,070 psi | 87% | 2608 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 53,127 psi | 85% | 2631 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,782 psi | 89% | 2657 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2753 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 55,259 psi | 89% | 2589 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,694 psi | 88% | 2612 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,130 psi | 90% | 2654 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,965 psi | 79% | 2572 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 55,724 psi | 89% | 2641 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,925 psi | 86% | 2664 fps | 98.3% |
| Norma MRP | <<locked>> | 96% | 52,895 psi | 85% | 2749 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 54,766 psi | 88% | 2674 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,130 psi | 90% | 2664 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,695 psi | 89% | 2769 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 53,200 psi | 85% | 2674 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2657 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 61% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,505 psi | 86% | 2598 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,519 psi | 86% | 2697 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,782 psi | 89% | 2710 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,940 psi | 86% | 2733 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,253 psi | 74% | 2687 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 84% | 54,230 psi | 87% | 2605 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,766 psi | 88% | 2648 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 55,390 psi | 89% | 2707 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 56,130 psi | 90% | 2635 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,694 psi | 88% | 2612 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,259 psi | 89% | 2589 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,130 psi | 90% | 2654 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,897 psi | 88% | 2651 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,389 psi | 87% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,201 psi | 87% | 2566 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,911 psi | 88% | 2703 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 53,998 psi | 87% | 2595 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,391 psi | 90% | 2644 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 54,172 psi | 87% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,115 psi | 90% | 2684 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 54,853 psi | 88% | 2569 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,272 psi | 85% | 2618 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,201 psi | 89% | 2661 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 55,521 psi | 89% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,883 psi | 90% | 2674 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,693 psi | 86% | 2690 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,142 psi | 85% | 2736 fps | 96.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,211 psi | 79% | 2664 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,695 psi | 89% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,563 psi | 87% | 2687 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,110 psi | 79% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,738 psi | 89% | 2674 fps | 98.6% |
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% | 52,257 psi | 84% | 2543 fps | 98.7% |
| Accurate 3100 | <<locked>> | 80% | 31,198 psi | 50% | 2221 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 41,220 psi | 66% | 2448 fps | 99.4% |
| Accurate High Country | 61.7 gr | 90% | 45,092 psi | 72% | 2615 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 94% | 48,573 psi | 78% | 2664 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 48,892 psi | 78% | 2516 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,524 psi | 67% | 2467 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 44,846 psi | 72% | 2559 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 36,027 psi | 58% | 2425 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,742 psi | 67% | 2474 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,908 psi | 80% | 2543 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,939 psi | 85% | 2602 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,305 psi | 63% | 2448 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,280 psi | 71% | 2556 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,321 psi | 66% | 2467 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,146 psi | 63% | 2464 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,791 psi | 48% | 2244 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,444 psi | 50% | 2303 fps | 95.6% |
| Alliant Reloder-26 | 56.5 gr | 80% | 31,763 psi | 51% | 2352 fps | 96.7% |
| Bofors RP15 | <<locked>> | 92% | 41,249 psi | 66% | 2507 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,720 psi | 81% | 2559 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 39,146 psi | 63% | 2464 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,527 psi | 71% | 2448 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 43,947 psi | 70% | 2536 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 50,749 psi | 81% | 2569 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,366 psi | 68% | 2480 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,005 psi | 72% | 2490 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 47,834 psi | 77% | 2566 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,891 psi | 75% | 2549 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,043 psi | 59% | 2349 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,725 psi | 62% | 2523 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 41,249 psi | 66% | 2493 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 45% | 1450 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,416 psi | 82% | 2543 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,914 psi | 64% | 2382 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,382 psi | 73% | 2464 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,334 psi | 63% | 2398 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,775 psi | 75% | 2510 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 45,716 psi | 73% | 2589 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 52,127 psi | 84% | 2543 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,540 psi | 70% | 2428 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,916 psi | 67% | 2418 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 32,532 psi | 52% | 2254 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 52,330 psi | 84% | 2589 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,887 psi | 67% | 2457 fps | 95.6% |
| Norma MRP | 57.6 gr | 84% | 36,172 psi | 58% | 2428 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 40,408 psi | 65% | 2434 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 80% | 52,620 psi | 84% | 2615 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,629 psi | 73% | 2602 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,073 psi | 63% | 2425 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 38,377 psi | 62% | 2438 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 45% | 1486 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,473 psi | 81% | 2552 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,818 psi | 75% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,654 psi | 65% | 2464 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,986 psi | 63% | 2464 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,781 psi | 57% | 2448 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,080 psi | 77% | 2513 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,730 psi | 73% | 2500 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 40,698 psi | 65% | 2454 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,527 psi | 71% | 2448 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,540 psi | 70% | 2428 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 52,127 psi | 84% | 2543 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,916 psi | 67% | 2418 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,501 psi | 78% | 2556 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,356 psi | 78% | 2405 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,699 psi | 68% | 2379 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,321 psi | 65% | 2451 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 47,993 psi | 77% | 2507 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,806 psi | 80% | 2543 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 37,072 psi | 59% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,695 psi | 59% | 2343 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 45,818 psi | 73% | 2441 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,553 psi | 67% | 2425 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 38,189 psi | 61% | 2372 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 52,373 psi | 84% | 2526 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,278 psi | 66% | 2434 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 33,112 psi | 53% | 2316 fps | 98.2% |
| Vihtavuori N560 | <<locked>> | 92% | 46,891 psi | 75% | 2628 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 98% | 46,108 psi | 74% | 2608 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,364 psi | 65% | 2395 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,525 psi | 68% | 2484 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,789 psi | 43% | 2244 fps | 97.8% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,364 psi | 65% | 2418 fps | 95.3% |
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 84 powders for .300 H&H Mag. loaded with the .308 | 200gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,792 fps; across all powders the maximum-charge window runs from 1,624 fps to 2,792 fps. ADI AR 2225 gives the best case fill at 100 %, and 84 of the 84 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 1:11.0 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for .300 H&H Mag. with the .308 | 200gr | Barnes X S 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.