Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 220gr | Woodleigh RN SN bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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 3100 | <<locked>> | 96% | 54,563 psi | 87% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 52,837 psi | 85% | 2549 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 52,910 psi | 85% | 2651 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 54,447 psi | 87% | 2510 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,461 psi | 86% | 2598 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 54,578 psi | 88% | 2651 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,585 psi | 73% | 2503 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,379 psi | 65% | 2467 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,577 psi | 86% | 2595 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,753 psi | 89% | 2533 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,722 psi | 86% | 2598 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,534 psi | 87% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,924 psi | 85% | 2589 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,244 psi | 87% | 2648 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,274 psi | 89% | 2621 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,981 psi | 82% | 2628 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,521 psi | 89% | 2710 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 53,229 psi | 85% | 2635 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,963 psi | 75% | 2569 fps | 98.1% |
| Bofors RP5 | <<locked>> | 96% | 54,244 psi | 87% | 2648 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 55,767 psi | 89% | 2549 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,111 psi | 80% | 2582 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 54,462 psi | 87% | 2595 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 53,896 psi | 86% | 2559 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 54,592 psi | 88% | 2595 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,577 psi | 86% | 2582 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,896 psi | 86% | 2530 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,835 psi | 80% | 2684 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 86% | 54,520 psi | 87% | 2631 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 59% | 1575 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 53,519 psi | 86% | 2536 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,824 psi | 86% | 2523 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 53,272 psi | 85% | 2543 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,883 psi | 90% | 2582 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 98% | 56,043 psi | 90% | 2687 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 54,317 psi | 87% | 2523 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,709 psi | 89% | 2566 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,996 psi | 83% | 2533 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,143 psi | 87% | 2585 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 35,969 psi | 58% | 2398 fps | 97% |
| Norma MRP | <<locked>> | 94% | 53,882 psi | 86% | 2667 fps | 100% |
| Norma URP | <<locked>> | 88% | 54,882 psi | 88% | 2582 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,765 psi | 85% | 2648 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 53,505 psi | 86% | 2585 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,636 psi | 88% | 2644 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 61% | 1614 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,143 psi | 87% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,347 psi | 90% | 2621 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,346 psi | 87% | 2644 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2680 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 44,962 psi | 72% | 2569 fps | 96% |
| Rottweil R 903 | <<locked>> | 82% | 53,447 psi | 86% | 2503 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,824 psi | 88% | 2569 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 94% | 55,912 psi | 90% | 2628 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 55,767 psi | 89% | 2549 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,317 psi | 87% | 2523 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,709 psi | 89% | 2566 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,853 psi | 88% | 2556 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,650 psi | 86% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,519 psi | 86% | 2480 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,463 psi | 89% | 2625 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 53,316 psi | 85% | 2497 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,434 psi | 90% | 2569 fps | 98.4% |
| Somchem S365 | <<locked>> | 90% | 54,882 psi | 88% | 2582 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,420 psi | 90% | 2605 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 54,433 psi | 87% | 2474 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,316 psi | 85% | 2530 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,883 psi | 90% | 2585 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 55,912 psi | 90% | 2582 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,128 psi | 87% | 2598 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,925 psi | 86% | 2664 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2644 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,159 psi | 90% | 2539 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,723 psi | 88% | 2602 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2746 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,347 psi | 90% | 2598 fps | 99.5% |
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 3100 | <<locked>> | 80% | 31,952 psi | 51% | 2175 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 43,062 psi | 69% | 2398 fps | 100% |
| Accurate MAGPRO | 64.7 gr | 88% | 42,931 psi | 69% | 2480 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 51,358 psi | 82% | 2467 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,085 psi | 58% | 2287 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 39,204 psi | 63% | 2379 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 96% | 40,103 psi | 64% | 2395 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 92% | 31,488 psi | 50% | 2254 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,361 psi | 58% | 2290 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,344 psi | 84% | 2487 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,481 psi | 67% | 2408 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,427 psi | 76% | 2510 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,042 psi | 58% | 2283 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 34,084 psi | 55% | 2280 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,719 psi | 49% | 2201 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 26,905 psi | 43% | 2116 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,199 psi | 53% | 2323 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 36,143 psi | 58% | 2326 fps | 95.6% |
| Bofors RP30 | <<locked>> | 94% | 38,392 psi | 62% | 2408 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 34,084 psi | 55% | 2280 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,253 psi | 74% | 2405 fps | 99% |
| Hodgdon H1000 | <<locked>> | 92% | 38,334 psi | 61% | 2362 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 44,860 psi | 72% | 2444 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 47,456 psi | 76% | 2457 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 41,858 psi | 67% | 2385 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 41,060 psi | 66% | 2372 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,030 psi | 63% | 2303 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 33,910 psi | 54% | 2343 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 43,787 psi | 70% | 2464 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 44% | 1404 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,713 psi | 67% | 2343 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,674 psi | 76% | 2428 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 41,234 psi | 66% | 2356 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 41,133 psi | 66% | 2336 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 40,147 psi | 64% | 2411 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,150 psi | 72% | 2382 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 43,424 psi | 70% | 2372 fps | 99% |
| Lovex S071 | <<locked>> | 80% | 27,601 psi | 44% | 2067 fps | 95% |
| Norma 204 | <<locked>> | 80% | 41,437 psi | 66% | 2375 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 31,705 psi | 51% | 2293 fps | 95.1% |
| Norma MRP | 57.7 gr | 80% | 33,185 psi | 53% | 2287 fps | 96.2% |
| Norma URP | <<locked>> | 80% | 42,409 psi | 68% | 2388 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 39,871 psi | 64% | 2421 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 41,147 psi | 66% | 2385 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 33,040 psi | 53% | 2257 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 45% | 1440 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,328 psi | 81% | 2549 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,960 psi | 69% | 2421 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,104 psi | 66% | 2431 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,938 psi | 53% | 2323 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 41,800 psi | 67% | 2507 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 50,053 psi | 80% | 2454 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,001 psi | 64% | 2323 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 35,302 psi | 57% | 2270 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,253 psi | 74% | 2405 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,150 psi | 72% | 2382 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 43,424 psi | 70% | 2372 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,256 psi | 82% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,517 psi | 81% | 2349 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,092 psi | 71% | 2336 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 34,983 psi | 56% | 2264 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 50,024 psi | 80% | 2451 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,424 psi | 70% | 2365 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 39,189 psi | 63% | 2352 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,868 psi | 58% | 2257 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 47,819 psi | 77% | 2385 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,816 psi | 70% | 2385 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 33,141 psi | 53% | 2195 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,163 psi | 69% | 2388 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 34,389 psi | 55% | 2267 fps | 99.4% |
| Vihtavuori N560 | 62.1 gr | 86% | 41,234 psi | 66% | 2444 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 92% | 40,683 psi | 65% | 2428 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,670 psi | 68% | 2352 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,860 psi | 72% | 2444 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,180 psi | 44% | 2211 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 34,954 psi | 56% | 2241 fps | 95.2% |
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 76 powders for .300 H&H Mag. loaded with the .308 | 220gr | Woodleigh RN SN. Winchester StaBALL HD delivers the highest muzzle velocity at 2,746 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,746 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 220.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 H&H Mag. with the .308 | 220gr | Woodleigh RN SN 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.