Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 155gr | Merlin Virtus bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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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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 2015 | <<locked>> | 82% | 54,172 psi | 87% | 2871 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,318 psi | 90% | 2940 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,694 psi | 88% | 2959 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,782 psi | 89% | 2949 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,859 psi | 70% | 2831 fps | 96.5% |
| Accurate 4064 | <<locked>> | 88% | 52,953 psi | 85% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,417 psi | 86% | 3028 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 53,519 psi | 86% | 2972 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 54,563 psi | 87% | 2972 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,927 psi | 90% | 2979 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,417 psi | 86% | 2900 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,316 psi | 85% | 3094 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,665 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,303 psi | 89% | 3018 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,723 psi | 88% | 3091 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,072 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,771 psi | 67% | 2864 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,297 psi | 76% | 3045 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,461 psi | 86% | 2989 fps | 99.6% |
| Bofors RP3 | <<locked>> | 90% | 55,448 psi | 89% | 3015 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,448 psi | 89% | 2986 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,983 psi | 87% | 2907 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,419 psi | 89% | 3002 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,434 psi | 90% | 3028 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 56,304 psi | 90% | 3081 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 92% | 53,258 psi | 85% | 2986 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 84% | 54,056 psi | 87% | 2986 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,621 psi | 88% | 3012 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,853 psi | 86% | 3018 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,229 psi | 85% | 3061 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,665 psi | 57% | 1860 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,347 psi | 89% | 2989 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,201 psi | 87% | 2966 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,157 psi | 87% | 2959 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,911 psi | 86% | 2936 fps | 97.7% |
| IMR 4350 | <<locked>> | 98% | 55,941 psi | 90% | 3012 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,882 psi | 86% | 2963 fps | 97.6% |
| IMR 4831 | <<locked>> | 98% | 53,954 psi | 87% | 3018 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 53,200 psi | 85% | 2995 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 55,927 psi | 90% | 2979 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,287 psi | 85% | 2946 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,173 psi | 90% | 2953 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,853 psi | 86% | 2953 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,432 psi | 86% | 2956 fps | 98.7% |
| Lovex S070 | <<locked>> | 96% | 54,418 psi | 87% | 2992 fps | 98% |
| Norma 201 | <<locked>> | 86% | 55,564 psi | 89% | 2969 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,260 psi | 90% | 2969 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,549 psi | 87% | 3009 fps | 100% |
| Norma MRPᴾ | <<locked>> | 100% | 47,007 psi | 75% | 2995 fps | 96.1% |
| Norma URP | <<locked>> | 98% | 56,057 psi | 90% | 3071 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 55,259 psi | 89% | 3031 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 54,940 psi | 88% | 3064 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 56,217 psi | 90% | 2999 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,941 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,027 psi | 58% | 1900 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,040 psi | 85% | 2953 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,883 psi | 90% | 3087 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,637 psi | 89% | 3123 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,272 psi | 85% | 3048 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,736 psi | 85% | 3077 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 56,086 psi | 90% | 2946 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,101 psi | 90% | 2969 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,317 psi | 89% | 3005 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,448 psi | 89% | 2986 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,432 psi | 86% | 2956 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,287 psi | 85% | 2946 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,853 psi | 86% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,418 psi | 87% | 2992 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,534 psi | 86% | 3012 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,679 psi | 88% | 2972 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,361 psi | 89% | 2995 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,592 psi | 86% | 2858 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,911 psi | 86% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,330 psi | 86% | 2904 fps | 97.6% |
| Somchem S335 | <<locked>> | 86% | 56,391 psi | 90% | 2904 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,462 psi | 87% | 2963 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 55,550 psi | 89% | 3002 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,418 psi | 87% | 3074 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2946 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 82% | 56,391 psi | 90% | 2864 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 53,983 psi | 87% | 2844 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,985 psi | 90% | 2930 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,316 psi | 85% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,577 psi | 86% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,056 psi | 88% | 3015 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 56,333 psi | 90% | 2976 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,940 psi | 88% | 2940 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,157 psi | 87% | 3018 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,151 psi | 74% | 2943 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,216 psi | 89% | 2989 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,997 psi | 85% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 52,924 psi | 85% | 3025 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,376 psi | 60% | 2871 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,579 psi | 89% | 3009 fps | 100% |
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 2015 | <<locked>> | 80% | 50,705 psi | 81% | 2818 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,033 psi | 69% | 2733 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,966 psi | 82% | 2900 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 48,646 psi | 78% | 2828 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 40,872 psi | 66% | 2769 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 40,756 psi | 65% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,838 psi | 56% | 2657 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 47,036 psi | 75% | 2858 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 39,842 psi | 64% | 2697 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,211 psi | 79% | 2867 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,850 psi | 80% | 2848 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,047 psi | 69% | 2894 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,552 psi | 63% | 2720 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,656 psi | 68% | 2792 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,867 psi | 56% | 2674 fps | 95.6% |
| Alliant Reloder-17 | 58.9 gr | 80% | 34,301 psi | 55% | 2687 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,197 psi | 48% | 2566 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,782 psi | 61% | 2828 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,441 psi | 74% | 2861 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 39,378 psi | 63% | 2723 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 45,672 psi | 73% | 2808 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,705 psi | 81% | 2854 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,225 psi | 77% | 2887 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,176 psi | 64% | 2730 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 88% | 43,018 psi | 69% | 2838 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 90% | 49,937 psi | 80% | 2927 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 47,543 psi | 76% | 2871 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,008 psi | 48% | 2507 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,772 psi | 70% | 2841 fps | 99.6% |
| Hodgdon Superformance | 70 gr | 90% | 45,730 psi | 73% | 2917 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 42% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,585 psi | 73% | 2822 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 47,485 psi | 76% | 2864 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,858 psi | 67% | 2736 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,353 psi | 71% | 2759 fps | 95.5% |
| IMR 4350 | <<locked>> | 92% | 46,151 psi | 74% | 2838 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,570 psi | 71% | 2789 fps | 95.4% |
| IMR 4831 | <<locked>> | 84% | 33,779 psi | 54% | 2612 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 43,743 psi | 70% | 2825 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 49,211 psi | 79% | 2867 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,412 psi | 74% | 2835 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,644 psi | 75% | 2789 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 41,713 psi | 67% | 2736 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 38,914 psi | 62% | 2674 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 42,003 psi | 67% | 2762 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 45,716 psi | 73% | 2805 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 46,267 psi | 74% | 2812 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,989 psi | 67% | 2779 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 43,772 psi | 70% | 2930 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 35,099 psi | 56% | 2661 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 41,756 psi | 67% | 2789 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 41,916 psi | 67% | 2825 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 49,240 psi | 79% | 2877 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,805 psi | 78% | 2897 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 43% | 1699 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,509 psi | 65% | 2710 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,368 psi | 73% | 2904 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,550 psi | 59% | 2756 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,693 psi | 56% | 2674 fps | 95% |
| ReloadSwiss RS 70 | 64.3 gr | 86% | 37,086 psi | 59% | 2743 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 49,792 psi | 80% | 2848 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,453 psi | 70% | 2753 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 36,869 psi | 59% | 2661 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 45,672 psi | 73% | 2808 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,914 psi | 62% | 2674 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,412 psi | 74% | 2835 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,713 psi | 67% | 2736 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 42,003 psi | 67% | 2762 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,189 psi | 61% | 2720 fps | 97.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,355 psi | 76% | 2848 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,542 psi | 73% | 2825 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,123 psi | 76% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,334 psi | 63% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,758 psi | 70% | 2733 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 46,659 psi | 75% | 2753 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,224 psi | 76% | 2844 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 37,666 psi | 60% | 2667 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 27,441 psi | 44% | 2487 fps | 95.7% |
| Somchem S385 | <<locked>> | 98% | 46,876 psi | 75% | 2884 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 53,142 psi | 85% | 2818 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,587 psi | 76% | 2749 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,308 psi | 69% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,801 psi | 70% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,839 psi | 57% | 2602 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 82% | 34,360 psi | 55% | 2608 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 49,371 psi | 79% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,351 psi | 68% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,071 psi | 58% | 2661 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 90% | 32,721 psi | 52% | 2644 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,749 psi | 51% | 2523 fps | 96.5% |
| Winchester 748 | <<locked>> | 80% | 49,429 psi | 79% | 2913 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,192 psi | 69% | 2841 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,400 psi | 49% | 2651 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,150 psi | 72% | 2831 fps | 99.5% |
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 94 powders for .300 H&H Mag. loaded with the .308 | 155gr | Merlin Virtus. Alliant Reloder-17 delivers the highest muzzle velocity at 3,127 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,127 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 H&H Mag. with the .308 | 155gr | Merlin Virtus 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.