Load Specifications
Load data in caliber .300 H&H Mag. with .311 | 150gr | Impala LW CFN bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Ramshot Hunter.
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 2495 | <<locked>> | 84% | 55,172 psi | 88% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,622 psi | 89% | 2966 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,675 psi | 78% | 2936 fps | 97.3% |
| Accurate 4064 | <<locked>> | 86% | 55,143 psi | 88% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,491 psi | 87% | 3064 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 82% | 53,577 psi | 86% | 2995 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 88% | 54,331 psi | 87% | 2995 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,535 psi | 89% | 2995 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 52,924 psi | 85% | 3110 fps | 99.6% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,868 psi | 88% | 3077 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,013 psi | 88% | 3025 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,376 psi | 89% | 3045 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,433 psi | 87% | 3114 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,695 psi | 89% | 3146 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,128 psi | 87% | 3068 fps | 95.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,513 psi | 73% | 2959 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,300 psi | 82% | 3140 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 52,997 psi | 85% | 3002 fps | 99.4% |
| Bofors RP3 | <<locked>> | 88% | 56,144 psi | 90% | 3045 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 55,651 psi | 89% | 3009 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,637 psi | 89% | 3031 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 53,272 psi | 85% | 2999 fps | 99% |
| Hodgdon H414 | <<locked>> | 94% | 56,173 psi | 90% | 3104 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 92% | 56,434 psi | 90% | 3061 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 54,143 psi | 87% | 3009 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,578 psi | 88% | 3038 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,737 psi | 86% | 3041 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,721 psi | 85% | 3074 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,289 psi | 58% | 1893 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,824 psi | 88% | 3005 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,476 psi | 87% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,896 psi | 86% | 2979 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,461 psi | 86% | 2949 fps | 97.2% |
| IMR 4350 | <<locked>> | 96% | 55,637 psi | 89% | 3028 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,635 psi | 86% | 2982 fps | 97.2% |
| IMR 4831 | <<locked>> | 96% | 54,708 psi | 88% | 3054 fps | 99.5% |
| IMR 4895 | <<locked>> | 84% | 53,417 psi | 86% | 3022 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 82% | 55,535 psi | 89% | 2995 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,099 psi | 87% | 2979 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,796 psi | 89% | 2969 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 54,520 psi | 87% | 2986 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,983 psi | 87% | 2986 fps | 98.5% |
| Lovex S070 | <<locked>> | 94% | 54,984 psi | 88% | 3022 fps | 97.8% |
| Norma 201 | <<locked>> | 84% | 56,057 psi | 90% | 2999 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,185 psi | 85% | 2946 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,650 psi | 88% | 3031 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 56,333 psi | 90% | 3081 fps | 96% |
| Norma MRPᴾ | <<locked>> | 100% | 50,778 psi | 81% | 3091 fps | 96.7% |
| Norma URP | <<locked>> | 96% | 56,420 psi | 90% | 3100 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 55,027 psi | 88% | 3054 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 54,926 psi | 88% | 3091 fps | 98.4% |
| Ramshot TAC | <<locked>> | 82% | 55,579 psi | 89% | 3009 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,666 psi | 89% | 3035 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 59% | 1939 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,318 psi | 90% | 3028 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,999 psi | 90% | 3114 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,492 psi | 89% | 3150 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,824 psi | 86% | 3081 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,999 psi | 90% | 3159 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 84% | 53,505 psi | 86% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,202 psi | 90% | 3041 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 55,651 psi | 89% | 3009 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,983 psi | 87% | 2986 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,099 psi | 87% | 2979 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,520 psi | 87% | 2986 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,984 psi | 88% | 3022 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,621 psi | 86% | 3038 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,737 psi | 88% | 2992 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,332 psi | 89% | 3018 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,621 psi | 86% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,925 psi | 86% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,708 psi | 86% | 2930 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 53,243 psi | 85% | 2881 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,070 psi | 87% | 2982 fps | 99.8% |
| Somchem S355 | <<locked>> | 90% | 56,130 psi | 90% | 3031 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,694 psi | 88% | 3104 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,331 psi | 87% | 3035 fps | 96.9% |
| Vihtavuori N133 | <<locked>> | 82% | 53,867 psi | 86% | 2867 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,376 psi | 90% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,505 psi | 86% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,911 psi | 86% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,071 psi | 88% | 3038 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 82% | 55,985 psi | 90% | 2995 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,187 psi | 88% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,302 psi | 87% | 3041 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,604 psi | 81% | 3045 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,694 psi | 88% | 3009 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,333 psi | 90% | 3045 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,434 psi | 90% | 3110 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,234 psi | 66% | 2986 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,143 psi | 88% | 3025 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 2495 | <<locked>> | 80% | 49,008 psi | 79% | 2844 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 48,950 psi | 78% | 2851 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 40,263 psi | 65% | 2769 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,296 psi | 74% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,679 psi | 56% | 2661 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 50,502 psi | 81% | 2943 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 42,888 psi | 69% | 2779 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,315 psi | 84% | 2943 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,369 psi | 74% | 2986 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 51,619 psi | 83% | 3018 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,424 psi | 70% | 2815 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,253 psi | 74% | 2877 fps | 98.8% |
| Alliant Reloder-16 | 56.4 gr | 82% | 35,969 psi | 58% | 2713 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,869 psi | 61% | 2789 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 50,923 psi | 82% | 3012 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 32,068 psi | 51% | 2628 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,738 psi | 59% | 2812 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,748 psi | 80% | 2946 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 43,743 psi | 70% | 2828 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 46,499 psi | 75% | 2841 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,141 psi | 84% | 2976 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,048 psi | 71% | 2825 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 88% | 46,601 psi | 75% | 2930 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 49,821 psi | 80% | 2946 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 50,981 psi | 82% | 2953 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,691 psi | 51% | 2562 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,123 psi | 76% | 2927 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 46,093 psi | 74% | 2943 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 44% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,559 psi | 78% | 2897 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 51,140 psi | 82% | 2946 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,078 psi | 72% | 2818 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,311 psi | 76% | 2838 fps | 95.9% |
| IMR 4350 | <<locked>> | 90% | 46,557 psi | 75% | 2867 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,933 psi | 72% | 2815 fps | 95.1% |
| IMR 4831 | <<locked>> | 82% | 35,476 psi | 57% | 2664 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 47,340 psi | 76% | 2913 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 52,315 psi | 84% | 2943 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,662 psi | 81% | 2923 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,792 psi | 80% | 2867 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 45,759 psi | 73% | 2828 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 40,234 psi | 65% | 2717 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 43,395 psi | 70% | 2802 fps | 95% |
| Norma 201 | <<locked>> | 80% | 49,951 psi | 80% | 2897 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 50,067 psi | 80% | 2897 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,658 psi | 73% | 2867 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 52,692 psi | 84% | 3018 fps | 95.1% |
| Norma MRP | <<locked>> | 98% | 47,485 psi | 76% | 3025 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 36,550 psi | 59% | 2707 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 45,295 psi | 73% | 2881 fps | 98.9% |
| Ramshot Hunter | 64.2 gr | 88% | 42,830 psi | 69% | 2858 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 52,315 psi | 84% | 2953 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,228 psi | 84% | 2976 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 44% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,121 psi | 71% | 2802 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,936 psi | 78% | 2992 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,103 psi | 64% | 2858 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,318 psi | 58% | 2726 fps | 95.2% |
| ReloadSwiss RS 70 | 63.2 gr | 84% | 38,072 psi | 61% | 2782 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 47,703 psi | 76% | 2848 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 41,365 psi | 66% | 2772 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 46,499 psi | 75% | 2841 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,234 psi | 65% | 2717 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,662 psi | 81% | 2923 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,759 psi | 73% | 2828 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 43,395 psi | 70% | 2802 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,597 psi | 67% | 2812 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,314 psi | 82% | 2936 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,747 psi | 78% | 2907 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,401 psi | 81% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,525 psi | 68% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,759 psi | 72% | 2766 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 50,444 psi | 81% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,720 psi | 81% | 2927 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 41,742 psi | 67% | 2772 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 31,212 psi | 50% | 2608 fps | 97.2% |
| Somchem S385 | <<locked>> | 96% | 47,819 psi | 77% | 2920 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 50,633 psi | 81% | 2818 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,210 psi | 76% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,398 psi | 76% | 2825 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,697 psi | 64% | 2700 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 35,578 psi | 57% | 2651 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 52,634 psi | 84% | 2943 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,876 psi | 74% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 37,623 psi | 60% | 2710 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 32,837 psi | 53% | 2657 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,099 psi | 56% | 2618 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 52,750 psi | 85% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 43,874 psi | 70% | 2874 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,472 psi | 49% | 2657 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,704 psi | 78% | 2917 fps | 99.7% |
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 91 powders for .300 H&H Mag. loaded with the .311 | 150gr | Impala LW CFN. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,893 fps to 3,159 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 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 150.0 gr projectile in 0.311" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Power Pro Varmint, Alliant Reloder-19 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-16, ReloadSwiss RS 70, Ramshot Hunter rank at the top here: for .300 H&H Mag. with the .311 | 150gr | Impala LW CFN 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.