Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 180gr | Winchester Silvertip 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% | 54,143 psi | 87% | 2756 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,231 psi | 90% | 2861 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 53,664 psi | 86% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,520 psi | 87% | 2851 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 53,534 psi | 86% | 2940 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 98% | 54,331 psi | 87% | 2936 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 53,577 psi | 86% | 2772 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,303 psi | 89% | 2894 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 53,069 psi | 85% | 2887 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,463 psi | 89% | 2890 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,418 psi | 87% | 2795 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,708 psi | 88% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,245 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,620 psi | 84% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,708 psi | 88% | 2881 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,854 psi | 90% | 2943 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,605 psi | 84% | 2871 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,672 psi | 73% | 2799 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,620 psi | 84% | 2953 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,966 psi | 82% | 2861 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 55,303 psi | 89% | 2815 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,854 psi | 90% | 2943 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 54,621 psi | 88% | 2799 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 55,637 psi | 89% | 2831 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 52,953 psi | 85% | 2848 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 56,159 psi | 90% | 2861 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 53,040 psi | 85% | 2831 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,709 psi | 89% | 2874 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,608 psi | 89% | 2831 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,889 psi | 72% | 2835 fps | 97% |
| Hodgdon Superformance | <<locked>> | 88% | 52,968 psi | 85% | 2881 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1759 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,391 psi | 90% | 2805 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,332 psi | 89% | 2789 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,709 psi | 89% | 2835 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,159 psi | 90% | 2825 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 54,868 psi | 88% | 2841 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,144 psi | 90% | 2844 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,694 psi | 88% | 2822 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,114 psi | 87% | 2920 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 53,345 psi | 86% | 2749 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,333 psi | 90% | 2822 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,230 psi | 87% | 2812 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,543 psi | 75% | 2707 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 54,012 psi | 87% | 2805 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,692 psi | 84% | 2828 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 55,347 psi | 89% | 2966 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 53,055 psi | 85% | 2835 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,607 psi | 88% | 2828 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,491 psi | 87% | 2936 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 55,564 psi | 89% | 2890 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,602 psi | 78% | 2808 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 60% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,390 psi | 89% | 2815 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,898 psi | 90% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,186 psi | 87% | 2871 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,620 psi | 84% | 2897 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,831 psi | 72% | 2828 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 55,259 psi | 89% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,390 psi | 89% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,388 psi | 86% | 2808 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 96% | 54,070 psi | 87% | 2871 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,621 psi | 88% | 2799 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,333 psi | 90% | 2822 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 53,345 psi | 86% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,230 psi | 87% | 2812 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,490 psi | 86% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,318 psi | 90% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,999 psi | 90% | 2779 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,606 psi | 86% | 2864 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 55,230 psi | 89% | 2805 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,013 psi | 88% | 2802 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 56,144 psi | 90% | 2887 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,708 psi | 88% | 2844 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 55,753 psi | 89% | 2723 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,796 psi | 89% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 53,098 psi | 85% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,245 psi | 89% | 2831 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 2822 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 54,041 psi | 87% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,288 psi | 87% | 2835 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,390 psi | 89% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,535 psi | 89% | 2956 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,636 psi | 88% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,200 psi | 85% | 2848 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,066 psi | 77% | 2936 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,592 psi | 88% | 2838 fps | 98.1% |
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% | 50,575 psi | 81% | 2697 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,896 psi | 56% | 2470 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 50,488 psi | 81% | 2697 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,711 psi | 62% | 2569 fps | 98.6% |
| Accurate High Country | 70.9 gr | 92% | 46,543 psi | 75% | 2815 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 96% | 50,734 psi | 81% | 2877 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,297 psi | 76% | 2671 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,525 psi | 68% | 2661 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 49,603 psi | 80% | 2825 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,786 psi | 69% | 2664 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,022 psi | 77% | 2697 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,314 psi | 82% | 2766 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,449 psi | 60% | 2575 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,685 psi | 68% | 2703 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,308 psi | 68% | 2657 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,670 psi | 68% | 2707 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,615 psi | 44% | 2336 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,286 psi | 53% | 2510 fps | 95.7% |
| Alliant Reloder-26 | 65.1 gr | 82% | 31,647 psi | 51% | 2507 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 42,090 psi | 67% | 2694 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,443 psi | 78% | 2707 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,670 psi | 68% | 2707 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,569 psi | 68% | 2582 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 48,834 psi | 78% | 2720 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,538 psi | 65% | 2615 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 43,424 psi | 70% | 2635 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 49,559 psi | 79% | 2769 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,069 psi | 83% | 2812 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,186 psi | 56% | 2474 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,076 psi | 67% | 2769 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,479 psi | 63% | 2625 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 44% | 1572 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,763 psi | 80% | 2703 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,141 psi | 84% | 2736 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 38,218 psi | 61% | 2510 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,947 psi | 70% | 2615 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 37,130 psi | 60% | 2523 fps | 98.3% |
| IMR 4895 | <<locked>> | 80% | 52,605 psi | 84% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,370 psi | 78% | 2713 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 47,268 psi | 76% | 2795 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 50,198 psi | 80% | 2703 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,510 psi | 67% | 2566 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 39,639 psi | 64% | 2546 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 33,939 psi | 54% | 2448 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 50,662 psi | 81% | 2753 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,163 psi | 69% | 2654 fps | 95.4% |
| Norma MRP | 66.3 gr | 86% | 36,550 psi | 59% | 2598 fps | 95% |
| Norma URP | <<locked>> | 80% | 38,305 psi | 61% | 2562 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,966 psi | 82% | 2776 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,326 psi | 76% | 2808 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 37,188 psi | 60% | 2549 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 39,218 psi | 63% | 2621 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 45% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,776 psi | 78% | 2707 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,353 psi | 73% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,406 psi | 62% | 2585 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,130 psi | 60% | 2592 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,928 psi | 62% | 2690 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 52,025 psi | 83% | 2713 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,585 psi | 73% | 2654 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,050 psi | 75% | 2697 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 41,408 psi | 66% | 2638 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,569 psi | 68% | 2582 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,510 psi | 67% | 2566 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 50,198 psi | 80% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,639 psi | 64% | 2546 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,760 psi | 75% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,818 psi | 75% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,567 psi | 65% | 2510 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,017 psi | 66% | 2631 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 45,876 psi | 74% | 2654 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,634 psi | 83% | 2746 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 34,925 psi | 56% | 2523 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,407 psi | 63% | 2566 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 52,402 psi | 84% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,330 psi | 84% | 2687 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,743 psi | 70% | 2582 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,813 psi | 64% | 2562 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 92% | 41,321 psi | 66% | 2602 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 50,720 psi | 81% | 2687 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,276 psi | 63% | 2566 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 30,516 psi | 49% | 2411 fps | 96.6% |
| Vihtavuori N560 | <<locked>> | 94% | 48,414 psi | 78% | 2831 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,870 psi | 62% | 2533 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,698 psi | 65% | 2618 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,005 psi | 42% | 2365 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,437 psi | 66% | 2608 fps | 95.1% |
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 | 180gr | Winchester Silvertip. Norma MRP delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,759 fps to 2,966 fps. Accurate 3100 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 180.0 gr projectile in 0.308" calls for a 1:6.0 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, Accurate High Country, Norma MRP rank at the top here: for .300 H&H Mag. with the .308 | 180gr | Winchester Silvertip 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.