Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 200gr | Speer TBBC bullet and 89 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% | 53,925 psi | 86% | 2595 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,376 psi | 89% | 2690 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 53,534 psi | 86% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,070 psi | 87% | 2684 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 53,563 psi | 86% | 2772 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 53,200 psi | 85% | 2605 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,911 psi | 88% | 2726 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,912 psi | 90% | 2776 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,260 psi | 90% | 2772 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,882 psi | 88% | 2723 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,201 psi | 87% | 2628 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,418 psi | 87% | 2651 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,752 psi | 88% | 2736 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,941 psi | 90% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,128 psi | 87% | 2717 fps | 98.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,940 psi | 88% | 2772 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,982 psi | 83% | 2703 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,165 psi | 72% | 2641 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,811 psi | 89% | 2838 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,531 psi | 81% | 2703 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 54,853 psi | 88% | 2644 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,940 psi | 88% | 2772 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 54,259 psi | 87% | 2635 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 44,947 psi | 72% | 2582 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 84% | 55,114 psi | 88% | 2661 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,941 psi | 90% | 2733 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 55,883 psi | 90% | 2694 fps | 99% |
| Hodgdon H4831 | <<locked>> | 98% | 56,159 psi | 90% | 2720 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,071 psi | 88% | 2707 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,071 psi | 88% | 2661 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,324 psi | 71% | 2677 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 90% | 56,362 psi | 90% | 2772 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 58% | 1634 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,057 psi | 90% | 2635 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,201 psi | 89% | 2625 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 55,303 psi | 89% | 2671 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,840 psi | 90% | 2661 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 54,375 psi | 87% | 2674 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,840 psi | 90% | 2674 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,360 psi | 87% | 2661 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,476 psi | 86% | 2753 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 53,214 psi | 85% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,912 psi | 90% | 2654 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 53,896 psi | 86% | 2648 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,021 psi | 74% | 2549 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 53,722 psi | 86% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,854 psi | 90% | 2717 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 54,549 psi | 87% | 2795 fps | 99.6% |
| Norma URP | <<locked>> | 92% | 56,115 psi | 90% | 2717 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,331 psi | 87% | 2661 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,954 psi | 87% | 2769 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 54,868 psi | 88% | 2720 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,921 psi | 77% | 2648 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 60% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,129 psi | 88% | 2648 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,463 psi | 89% | 2746 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,838 psi | 86% | 2707 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,956 psi | 90% | 2785 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,034 psi | 71% | 2667 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 55,071 psi | 88% | 2595 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,984 psi | 88% | 2641 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,127 psi | 85% | 2648 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 53,359 psi | 86% | 2700 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 54,259 psi | 87% | 2635 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,912 psi | 90% | 2654 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 53,214 psi | 85% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,896 psi | 86% | 2648 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,405 psi | 90% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,883 psi | 90% | 2530 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,637 psi | 89% | 2615 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,895 psi | 85% | 2697 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 54,984 psi | 88% | 2638 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,578 psi | 88% | 2641 fps | 96.9% |
| Somchem S365 | <<locked>> | 94% | 55,608 psi | 89% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,041 psi | 87% | 2680 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 55,274 psi | 89% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,608 psi | 89% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,318 psi | 90% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,853 psi | 88% | 2664 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2657 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 53,751 psi | 86% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,896 psi | 86% | 2667 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,766 psi | 88% | 2730 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,795 psi | 88% | 2789 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 46,746 psi | 75% | 2644 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,201 psi | 87% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,188 psi | 90% | 2733 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,036 psi | 75% | 2766 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,143 psi | 87% | 2677 fps | 98.5% |
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% | 50,531 psi | 81% | 2543 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 32,329 psi | 52% | 2280 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 50,111 psi | 80% | 2533 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,392 psi | 62% | 2421 fps | 99% |
| Accurate MAGPRO | <<locked>> | 96% | 50,038 psi | 80% | 2713 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 47,123 psi | 76% | 2513 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,581 psi | 63% | 2454 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 94% | 45,788 psi | 73% | 2605 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,228 psi | 84% | 2717 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 39,885 psi | 64% | 2461 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,732 psi | 77% | 2533 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,966 psi | 82% | 2598 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,333 psi | 60% | 2431 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,206 psi | 68% | 2543 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,465 psi | 63% | 2454 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,479 psi | 63% | 2500 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,383 psi | 44% | 2208 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,038 psi | 50% | 2320 fps | 95.6% |
| Alliant Reloder-26 | 58.1 gr | 80% | 29,269 psi | 47% | 2310 fps | 95.7% |
| Bofors RP15 | <<locked>> | 92% | 38,957 psi | 62% | 2487 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 48,196 psi | 77% | 2549 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,479 psi | 63% | 2500 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,308 psi | 68% | 2431 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 41,989 psi | 67% | 2523 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 48,515 psi | 78% | 2562 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 40,248 psi | 65% | 2464 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 43,236 psi | 69% | 2484 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 92% | 46,021 psi | 74% | 2559 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,080 psi | 77% | 2595 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,824 psi | 56% | 2329 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,030 psi | 63% | 2559 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 39,175 psi | 63% | 2477 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 44% | 1460 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,588 psi | 80% | 2539 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,735 psi | 83% | 2572 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 37,942 psi | 61% | 2365 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,787 psi | 70% | 2461 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 36,956 psi | 59% | 2379 fps | 98.8% |
| IMR 4895 | <<locked>> | 80% | 52,272 psi | 84% | 2625 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,008 psi | 77% | 2559 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 43,787 psi | 70% | 2579 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 49,835 psi | 80% | 2536 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,220 psi | 66% | 2415 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 39,479 psi | 63% | 2398 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 31,531 psi | 51% | 2260 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 50,299 psi | 81% | 2589 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,045 psi | 64% | 2448 fps | 95.2% |
| Norma MRP | 60.6 gr | 86% | 36,187 psi | 58% | 2457 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 38,130 psi | 61% | 2415 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 50,633 psi | 81% | 2608 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,642 psi | 70% | 2589 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,985 psi | 59% | 2405 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 94% | 38,740 psi | 62% | 2474 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 45% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,443 psi | 78% | 2546 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,846 psi | 72% | 2592 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,130 psi | 61% | 2441 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,869 psi | 59% | 2448 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,868 psi | 58% | 2480 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 51,779 psi | 83% | 2549 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,339 psi | 73% | 2497 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 43,932 psi | 70% | 2493 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 38,421 psi | 62% | 2434 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,308 psi | 68% | 2431 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,220 psi | 66% | 2415 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 49,835 psi | 80% | 2536 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,479 psi | 63% | 2398 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,557 psi | 75% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,601 psi | 75% | 2405 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,306 psi | 65% | 2362 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,058 psi | 61% | 2431 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 45,585 psi | 73% | 2497 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,776 psi | 77% | 2533 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 34,606 psi | 55% | 2379 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 36,593 psi | 59% | 2369 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 52,170 psi | 84% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,083 psi | 84% | 2523 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,555 psi | 70% | 2431 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,552 psi | 63% | 2415 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 38,522 psi | 62% | 2405 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,386 psi | 81% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,986 psi | 63% | 2418 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 30,255 psi | 49% | 2277 fps | 97.3% |
| Vihtavuori N560 | 64.8 gr | 92% | 44,831 psi | 72% | 2615 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 43,888 psi | 70% | 2592 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,508 psi | 62% | 2385 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,451 psi | 65% | 2470 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,265 psi | 39% | 2185 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,930 psi | 66% | 2457 fps | 95.7% |
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 89 powders for .300 H&H Mag. loaded with the .308 | 200gr | Speer TBBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,838 fps; across all powders the maximum-charge window runs from 1,634 fps to 2,838 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 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 200.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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, Norma MRP, Vihtavuori N560 rank at the top here: for .300 H&H Mag. with the .308 | 200gr | Speer TBBC 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.