Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 201gr | RWS UNI Classic bullet and 87 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.
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% | 55,448 psi | 89% | 2625 fps | 99.4% |
| Accurate 3100 | <<locked>> | 98% | 53,896 psi | 86% | 2674 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,013 psi | 88% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,912 psi | 90% | 2713 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,071 psi | 88% | 2812 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 98% | 56,014 psi | 90% | 2812 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 54,926 psi | 88% | 2635 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,214 psi | 85% | 2710 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 54,215 psi | 87% | 2756 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,478 psi | 60% | 2497 fps | 96.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,258 psi | 85% | 2703 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,724 psi | 89% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,927 psi | 90% | 2677 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,156 psi | 85% | 2713 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,273 psi | 87% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,072 psi | 90% | 2749 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,490 psi | 86% | 2753 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,331 psi | 87% | 2736 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,978 psi | 75% | 2677 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,331 psi | 87% | 2818 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,460 psi | 84% | 2736 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 53,156 psi | 85% | 2621 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,931 psi | 69% | 2605 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 53,490 psi | 86% | 2753 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 55,796 psi | 89% | 2664 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,673 psi | 75% | 2625 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 53,287 psi | 85% | 2638 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,447 psi | 87% | 2713 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 53,940 psi | 86% | 2671 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 54,505 psi | 87% | 2703 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,243 psi | 85% | 2687 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,621 psi | 86% | 2644 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,093 psi | 74% | 2720 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 88% | 54,360 psi | 87% | 2746 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 59% | 1647 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,273 psi | 87% | 2615 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,490 psi | 86% | 2648 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,172 psi | 87% | 2641 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 56,275 psi | 90% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,115 psi | 90% | 2694 fps | 97.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,535 psi | 89% | 2789 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 54,505 psi | 87% | 2608 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,201 psi | 87% | 2638 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,709 psi | 89% | 2680 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,993 psi | 77% | 2585 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 55,288 psi | 89% | 2661 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,186 psi | 87% | 2700 fps | 98.7% |
| Norma MRP | <<locked>> | 96% | 53,113 psi | 85% | 2779 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,650 psi | 88% | 2700 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,014 psi | 90% | 2687 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,072 psi | 90% | 2808 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 53,359 psi | 86% | 2703 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,009 psi | 80% | 2687 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 60% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,243 psi | 85% | 2628 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,577 psi | 86% | 2720 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,724 psi | 89% | 2733 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,041 psi | 87% | 2762 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,093 psi | 74% | 2717 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 56,391 psi | 90% | 2615 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 53,214 psi | 85% | 2618 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,781 psi | 88% | 2680 fps | 98% |
| Rottweil R 905 | <<locked>> | 96% | 55,405 psi | 89% | 2736 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 88% | 55,796 psi | 89% | 2664 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,201 psi | 87% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,505 psi | 87% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,709 psi | 89% | 2680 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,781 psi | 88% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,012 psi | 87% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,780 psi | 86% | 2595 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,940 psi | 88% | 2733 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 53,272 psi | 85% | 2618 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,434 psi | 90% | 2677 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 54,244 psi | 87% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,956 psi | 90% | 2710 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 54,389 psi | 87% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,185 psi | 85% | 2644 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,361 psi | 89% | 2694 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 55,143 psi | 88% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,666 psi | 89% | 2697 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,345 psi | 86% | 2713 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,345 psi | 86% | 2769 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,052 psi | 79% | 2687 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,072 psi | 90% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,447 psi | 87% | 2713 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,082 psi | 80% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,246 psi | 90% | 2710 fps | 99% |
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% | 51,822 psi | 83% | 2569 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 31,531 psi | 51% | 2264 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,808 psi | 83% | 2559 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,914 psi | 64% | 2454 fps | 99.4% |
| Accurate High Country | <<locked>> | 88% | 41,742 psi | 67% | 2579 fps | 95.2% |
| Accurate MAGPRO | 69.4 gr | 94% | 48,544 psi | 78% | 2694 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 48,573 psi | 78% | 2539 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,493 psi | 62% | 2438 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 44,454 psi | 71% | 2585 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 98% | 35,186 psi | 56% | 2441 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,667 psi | 62% | 2441 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,269 psi | 79% | 2562 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,533 psi | 84% | 2628 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,537 psi | 62% | 2461 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,888 psi | 70% | 2575 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,276 psi | 61% | 2434 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,435 psi | 62% | 2480 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,485 psi | 46% | 2241 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,168 psi | 48% | 2300 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,472 psi | 49% | 2349 fps | 96.6% |
| Bofors RP15 | <<locked>> | 90% | 38,116 psi | 61% | 2474 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,748 psi | 80% | 2575 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,161 psi | 64% | 2549 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 38,435 psi | 62% | 2480 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,642 psi | 70% | 2464 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 40,814 psi | 65% | 2507 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 49,995 psi | 80% | 2589 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,626 psi | 67% | 2497 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 44,585 psi | 71% | 2513 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 92% | 47,514 psi | 76% | 2592 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,630 psi | 75% | 2575 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,245 psi | 58% | 2359 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,029 psi | 61% | 2543 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 40,509 psi | 65% | 2510 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 44% | 1467 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,126 psi | 82% | 2569 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,175 psi | 63% | 2395 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,889 psi | 72% | 2487 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 38,174 psi | 61% | 2408 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,485 psi | 75% | 2539 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 42,540 psi | 68% | 2559 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 51,387 psi | 82% | 2562 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,525 psi | 68% | 2444 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 40,785 psi | 65% | 2428 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 30,763 psi | 49% | 2244 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 51,866 psi | 83% | 2612 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,638 psi | 62% | 2421 fps | 95.1% |
| Norma MRP | 60.9 gr | 84% | 35,143 psi | 56% | 2434 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,552 psi | 63% | 2448 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 80% | 52,315 psi | 84% | 2638 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 42,351 psi | 68% | 2572 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 38,290 psi | 61% | 2438 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 92% | 37,565 psi | 60% | 2454 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 45% | 1506 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,777 psi | 80% | 2572 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,644 psi | 75% | 2618 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,697 psi | 64% | 2474 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,218 psi | 61% | 2480 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,838 psi | 56% | 2464 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 53,142 psi | 85% | 2572 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,934 psi | 75% | 2526 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,496 psi | 68% | 2470 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 37,304 psi | 60% | 2415 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 43,642 psi | 70% | 2464 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,525 psi | 68% | 2444 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 51,387 psi | 82% | 2562 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,785 psi | 65% | 2428 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,993 psi | 77% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,892 psi | 77% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,539 psi | 67% | 2392 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,537 psi | 63% | 2467 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 47,079 psi | 75% | 2523 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,209 psi | 74% | 2513 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 36,085 psi | 58% | 2408 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,592 psi | 57% | 2349 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 44,962 psi | 72% | 2457 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,901 psi | 66% | 2444 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 37,434 psi | 60% | 2385 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,822 psi | 83% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,306 psi | 65% | 2444 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,618 psi | 51% | 2310 fps | 98% |
| Vihtavuori N560 | 66.7 gr | 92% | 46,572 psi | 75% | 2654 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 42,714 psi | 68% | 2572 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,827 psi | 64% | 2415 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,858 psi | 67% | 2500 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,135 psi | 40% | 2224 fps | 97.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,871 psi | 64% | 2441 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 87 powders for .300 H&H Mag. loaded with the .308 | 201gr | RWS UNI Classic. Alliant Reloder-26 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,818 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 201.0 gr projectile in 0.308" calls for a 1:12.5 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 H&H Mag. with the .308 | 201gr | RWS UNI Classic 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.