Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 200gr | Speer Hot-Cor bullet and 87 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.
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% | 54,897 psi | 88% | 2618 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 53,519 psi | 86% | 2671 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,636 psi | 88% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,492 psi | 89% | 2710 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,694 psi | 88% | 2808 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 55,376 psi | 89% | 2808 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 54,549 psi | 87% | 2635 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,275 psi | 90% | 2756 fps | 99% |
| ADI AR 2213 | <<locked>> | 98% | 53,896 psi | 86% | 2753 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,086 psi | 59% | 2487 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,910 psi | 85% | 2700 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,361 psi | 89% | 2651 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,593 psi | 89% | 2674 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,115 psi | 90% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,853 psi | 86% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,753 psi | 89% | 2746 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,127 psi | 85% | 2753 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,717 psi | 75% | 2677 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,925 psi | 86% | 2818 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2733 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 56,289 psi | 90% | 2667 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,127 psi | 85% | 2753 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 55,492 psi | 89% | 2661 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,166 psi | 74% | 2615 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 82% | 52,968 psi | 85% | 2638 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,867 psi | 86% | 2707 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 53,606 psi | 86% | 2667 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 53,983 psi | 87% | 2697 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,924 psi | 85% | 2684 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,011 psi | 85% | 2641 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,600 psi | 73% | 2713 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 88% | 53,998 psi | 87% | 2746 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 59% | 1647 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,940 psi | 86% | 2615 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,217 psi | 90% | 2648 fps | 99.7% |
| IMR 4350 | <<locked>> | 90% | 53,214 psi | 85% | 2648 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,577 psi | 86% | 2635 fps | 99.5% |
| IMR 4831 | <<locked>> | 92% | 55,927 psi | 90% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,564 psi | 89% | 2687 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,897 psi | 88% | 2782 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 54,172 psi | 87% | 2608 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,911 psi | 86% | 2635 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,114 psi | 88% | 2674 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,630 psi | 76% | 2582 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 54,940 psi | 88% | 2661 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,635 psi | 86% | 2694 fps | 98.5% |
| Norma MRP | <<locked>> | 98% | 56,434 psi | 90% | 2831 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 54,056 psi | 87% | 2694 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,651 psi | 89% | 2687 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,405 psi | 89% | 2802 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 52,794 psi | 85% | 2697 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,690 psi | 80% | 2684 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,420 psi | 60% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,347 psi | 90% | 2674 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,214 psi | 85% | 2720 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,376 psi | 89% | 2736 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,679 psi | 86% | 2759 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,571 psi | 73% | 2710 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 56,043 psi | 90% | 2615 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,405 psi | 90% | 2664 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,447 psi | 87% | 2677 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 55,071 psi | 88% | 2733 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 55,492 psi | 89% | 2661 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,911 psi | 86% | 2635 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,172 psi | 87% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,114 psi | 88% | 2674 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,447 psi | 87% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,693 psi | 86% | 2507 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% | 56,362 psi | 90% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,854 psi | 90% | 2671 fps | 97.3% |
| Somchem S365 | <<locked>> | 92% | 53,809 psi | 86% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,579 psi | 89% | 2710 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 54,027 psi | 87% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,115 psi | 90% | 2687 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,752 psi | 88% | 2687 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 54,839 psi | 88% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,332 psi | 89% | 2697 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,318 psi | 90% | 2756 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,968 psi | 85% | 2766 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,457 psi | 78% | 2680 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,738 psi | 89% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,128 psi | 87% | 2713 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,313 psi | 79% | 2802 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,637 psi | 89% | 2707 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% | 51,503 psi | 83% | 2566 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 31,241 psi | 50% | 2257 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,430 psi | 82% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,581 psi | 63% | 2451 fps | 99.3% |
| Accurate High Country | 63.6 gr | 88% | 41,394 psi | 66% | 2575 fps | 95% |
| Accurate MAGPRO | <<locked>> | 94% | 48,167 psi | 77% | 2687 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,269 psi | 77% | 2536 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,611 psi | 65% | 2484 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 44,193 psi | 71% | 2582 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 34,795 psi | 56% | 2431 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,363 psi | 62% | 2438 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,936 psi | 78% | 2559 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,185 psi | 84% | 2625 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,232 psi | 61% | 2457 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,555 psi | 70% | 2572 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,350 psi | 65% | 2480 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,145 psi | 61% | 2477 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,239 psi | 45% | 2238 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,921 psi | 48% | 2297 fps | 95.2% |
| Alliant Reloder-26 | 59.5 gr | 80% | 30,081 psi | 48% | 2339 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 40,205 psi | 64% | 2520 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,400 psi | 79% | 2572 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,145 psi | 61% | 2477 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,352 psi | 70% | 2461 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 98% | 43,192 psi | 69% | 2559 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,617 psi | 80% | 2585 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,321 psi | 66% | 2493 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 44,280 psi | 71% | 2510 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 47,210 psi | 76% | 2589 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,311 psi | 74% | 2575 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,940 psi | 58% | 2356 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,579 psi | 60% | 2530 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 40,248 psi | 65% | 2507 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 44% | 1473 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,792 psi | 81% | 2569 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,779 psi | 85% | 2598 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 38,899 psi | 62% | 2395 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,599 psi | 72% | 2484 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 37,869 psi | 61% | 2402 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,195 psi | 74% | 2536 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 45,150 psi | 72% | 2615 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,039 psi | 82% | 2562 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,235 psi | 68% | 2441 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,495 psi | 65% | 2425 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 30,501 psi | 49% | 2241 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,517 psi | 83% | 2612 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,988 psi | 66% | 2474 fps | 95.7% |
| Norma MRP | 60.7 gr | 84% | 34,867 psi | 56% | 2428 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,233 psi | 63% | 2444 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 51,996 psi | 83% | 2635 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,843 psi | 67% | 2562 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,971 psi | 61% | 2434 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,130 psi | 60% | 2448 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 45% | 1506 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,487 psi | 79% | 2569 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,238 psi | 74% | 2618 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,204 psi | 63% | 2467 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,927 psi | 61% | 2477 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,447 psi | 55% | 2451 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 52,794 psi | 85% | 2572 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,557 psi | 75% | 2523 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,206 psi | 68% | 2467 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 39,581 psi | 63% | 2467 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,352 psi | 70% | 2461 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,235 psi | 68% | 2441 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 51,039 psi | 82% | 2562 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,495 psi | 65% | 2425 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,674 psi | 76% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,572 psi | 76% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,278 psi | 66% | 2388 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,218 psi | 63% | 2461 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,760 psi | 75% | 2520 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,934 psi | 74% | 2513 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,752 psi | 57% | 2405 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,288 psi | 57% | 2346 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 44,643 psi | 72% | 2454 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,596 psi | 65% | 2441 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,014 psi | 59% | 2379 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,503 psi | 83% | 2543 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,016 psi | 64% | 2444 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,314 psi | 50% | 2306 fps | 97.8% |
| Vihtavuori N560 | <<locked>> | 92% | 46,253 psi | 74% | 2651 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 45,310 psi | 73% | 2625 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,537 psi | 63% | 2411 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,510 psi | 67% | 2497 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,932 psi | 40% | 2218 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,392 psi | 63% | 2434 fps | 95.4% |
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 87 powders for .300 H&H Mag. loaded with the .308 | 200gr | Speer Hot-Cor. Norma MRP delivers the highest muzzle velocity at 2,831 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,831 fps. ADI AR 2225 gives the best case fill at 100 %, and 87 of the 87 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 1:13.5 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 | Speer Hot-Cor 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.