Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 200gr | Lapua Subsonic bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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 2700 | <<locked>> | 82% | 54,244 psi | 87% | 2605 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,956 psi | 90% | 2703 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 53,780 psi | 86% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,491 psi | 87% | 2694 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,360 psi | 87% | 2789 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 53,650 psi | 86% | 2618 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,201 psi | 89% | 2736 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 52,968 psi | 85% | 2736 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,434 psi | 89% | 2736 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,621 psi | 88% | 2641 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,839 psi | 88% | 2661 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,143 psi | 88% | 2746 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,866 psi | 85% | 2717 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,679 psi | 88% | 2730 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2789 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2713 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,788 psi | 73% | 2657 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,547 psi | 84% | 2799 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,053 psi | 82% | 2717 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 55,288 psi | 89% | 2654 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2789 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 54,607 psi | 88% | 2644 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,382 psi | 73% | 2598 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 84% | 55,753 psi | 89% | 2674 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 52,982 psi | 85% | 2694 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 56,217 psi | 90% | 2707 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 96% | 52,982 psi | 85% | 2680 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,608 psi | 89% | 2720 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,477 psi | 89% | 2671 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,788 psi | 72% | 2694 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 52,910 psi | 85% | 2726 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 59% | 1644 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,156 psi | 85% | 2598 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,550 psi | 89% | 2635 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 55,579 psi | 89% | 2680 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,173 psi | 90% | 2671 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 54,984 psi | 88% | 2687 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,275 psi | 90% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,607 psi | 88% | 2671 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,954 psi | 87% | 2766 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 53,403 psi | 86% | 2592 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,040 psi | 85% | 2618 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,273 psi | 87% | 2657 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,601 psi | 75% | 2566 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 54,143 psi | 87% | 2648 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,434 psi | 90% | 2730 fps | 98.8% |
| Norma MRP | <<locked>> | 98% | 55,361 psi | 89% | 2812 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 53,113 psi | 85% | 2677 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,708 psi | 88% | 2671 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2782 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 92% | 55,463 psi | 89% | 2733 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,559 psi | 78% | 2664 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 60% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,477 psi | 89% | 2661 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,144 psi | 90% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,186 psi | 87% | 2717 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,649 psi | 84% | 2743 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,628 psi | 72% | 2687 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 55,463 psi | 89% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,680 psi | 89% | 2654 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,432 psi | 86% | 2657 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 53,954 psi | 87% | 2717 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 54,607 psi | 88% | 2644 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,040 psi | 85% | 2618 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 53,403 psi | 86% | 2592 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,273 psi | 87% | 2657 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,476 psi | 86% | 2661 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,304 psi | 90% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,941 psi | 90% | 2625 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,490 psi | 86% | 2710 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 55,390 psi | 89% | 2648 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,013 psi | 88% | 2654 fps | 97.1% |
| Somchem S365 | <<locked>> | 94% | 56,275 psi | 90% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,592 psi | 88% | 2694 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 82% | 55,767 psi | 89% | 2562 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,028 psi | 90% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 53,359 psi | 86% | 2579 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,216 psi | 89% | 2674 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2667 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 54,128 psi | 87% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,244 psi | 87% | 2677 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,405 psi | 89% | 2743 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,637 psi | 89% | 2805 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,471 psi | 76% | 2661 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,723 psi | 88% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,185 psi | 85% | 2694 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,761 psi | 77% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,636 psi | 88% | 2687 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% | 50,879 psi | 82% | 2552 fps | 98.7% |
| Accurate 3100 | <<locked>> | 82% | 30,618 psi | 49% | 2244 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 50,589 psi | 81% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,827 psi | 62% | 2434 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 47,210 psi | 76% | 2671 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,543 psi | 76% | 2523 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,074 psi | 64% | 2470 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 46,282 psi | 74% | 2618 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,205 psi | 64% | 2474 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,182 psi | 77% | 2546 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,401 psi | 82% | 2612 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,739 psi | 61% | 2444 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,830 psi | 69% | 2559 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,784 psi | 64% | 2464 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,987 psi | 64% | 2513 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,702 psi | 44% | 2221 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,285 psi | 50% | 2333 fps | 95.9% |
| Alliant Reloder-26 | 58.6 gr | 80% | 29,530 psi | 47% | 2326 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 39,450 psi | 63% | 2500 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 48,631 psi | 78% | 2559 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,987 psi | 64% | 2513 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,685 psi | 68% | 2444 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 42,395 psi | 68% | 2539 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 48,907 psi | 78% | 2572 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 40,669 psi | 65% | 2477 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 43,613 psi | 70% | 2493 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 46,514 psi | 75% | 2572 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 45,614 psi | 73% | 2559 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,230 psi | 56% | 2343 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,450 psi | 63% | 2575 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,508 psi | 63% | 2490 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 44% | 1467 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,038 psi | 80% | 2552 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,112 psi | 84% | 2582 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 38,290 psi | 61% | 2379 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,932 psi | 70% | 2470 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 37,188 psi | 60% | 2388 fps | 98.9% |
| IMR 4895 | <<locked>> | 80% | 52,721 psi | 85% | 2635 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,469 psi | 73% | 2520 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 44,251 psi | 71% | 2595 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 50,270 psi | 81% | 2549 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,582 psi | 67% | 2425 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 39,827 psi | 64% | 2411 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 31,865 psi | 51% | 2274 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 50,749 psi | 81% | 2598 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,379 psi | 65% | 2457 fps | 95.4% |
| Norma MRP | 59.7 gr | 84% | 34,171 psi | 55% | 2411 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,508 psi | 62% | 2428 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 51,256 psi | 82% | 2621 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,106 psi | 71% | 2602 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 37,362 psi | 60% | 2418 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 36,405 psi | 58% | 2428 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 45% | 1499 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,834 psi | 78% | 2556 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,498 psi | 73% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,522 psi | 62% | 2451 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,347 psi | 60% | 2461 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,216 psi | 58% | 2493 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 52,025 psi | 83% | 2556 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,788 psi | 73% | 2510 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,266 psi | 71% | 2503 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 38,783 psi | 62% | 2448 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,685 psi | 68% | 2444 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,582 psi | 67% | 2425 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 50,270 psi | 81% | 2549 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,827 psi | 64% | 2411 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,949 psi | 75% | 2562 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,804 psi | 75% | 2411 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,640 psi | 65% | 2375 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,421 psi | 62% | 2444 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 46,021 psi | 74% | 2507 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,240 psi | 77% | 2549 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 34,998 psi | 56% | 2388 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 36,927 psi | 59% | 2382 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 52,431 psi | 84% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,518 psi | 84% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,961 psi | 70% | 2441 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,900 psi | 64% | 2425 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 36,274 psi | 58% | 2362 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,778 psi | 81% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,392 psi | 63% | 2428 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 30,632 psi | 49% | 2290 fps | 97.5% |
| Vihtavuori N560 | 65.4 gr | 92% | 45,339 psi | 73% | 2631 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 44,353 psi | 71% | 2605 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,812 psi | 62% | 2395 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 40,843 psi | 65% | 2480 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,482 psi | 39% | 2198 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 38,682 psi | 62% | 2415 fps | 95% |
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 88 powders for .300 H&H Mag. loaded with the .308 | 200gr | Lapua Subsonic. Norma MRP delivers the highest muzzle velocity at 2,812 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,812 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 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 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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, Norma MRP, Vihtavuori N560 rank at the top here: for .300 H&H Mag. with the .308 | 200gr | Lapua Subsonic 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.