Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 155gr | Norma Kalahari bullet and 93 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% | 55,245 psi | 89% | 2877 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,578 psi | 88% | 2904 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,912 psi | 90% | 2969 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,098 psi | 85% | 2897 fps | 96.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,295 psi | 73% | 2851 fps | 96.8% |
| Accurate 4064 | <<locked>> | 88% | 54,505 psi | 87% | 2953 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,810 psi | 88% | 3041 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 54,505 psi | 87% | 2982 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 55,463 psi | 89% | 2982 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,359 psi | 86% | 2930 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,462 psi | 87% | 2907 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,244 psi | 87% | 3104 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,695 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,347 psi | 90% | 3031 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,651 psi | 89% | 3100 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,214 psi | 85% | 3077 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,685 psi | 68% | 2877 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,370 psi | 78% | 3058 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,157 psi | 87% | 2992 fps | 99.6% |
| Bofors RP3 | <<locked>> | 88% | 52,895 psi | 85% | 2966 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,997 psi | 85% | 2936 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,795 psi | 88% | 2913 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,794 psi | 85% | 2956 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,722 psi | 86% | 2979 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 94% | 53,766 psi | 86% | 3035 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 92% | 54,186 psi | 87% | 2995 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 84% | 55,056 psi | 88% | 2992 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,724 psi | 89% | 3022 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,839 psi | 88% | 3028 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,027 psi | 87% | 3068 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 57% | 1857 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,202 psi | 90% | 2995 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,259 psi | 89% | 2976 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,085 psi | 88% | 2969 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,766 psi | 88% | 2943 fps | 97.8% |
| IMR 4350 | <<locked>> | 96% | 53,417 psi | 86% | 2963 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,723 psi | 88% | 2969 fps | 97.7% |
| IMR 4831 | <<locked>> | 98% | 55,129 psi | 88% | 3031 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 54,230 psi | 87% | 3005 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 82% | 53,359 psi | 86% | 2930 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,520 psi | 87% | 2959 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,795 psi | 86% | 2907 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 54,955 psi | 88% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,259 psi | 87% | 2963 fps | 98.8% |
| Lovex S070 | <<locked>> | 96% | 55,332 psi | 89% | 2999 fps | 98.1% |
| Norma 201 | <<locked>> | 84% | 53,214 psi | 85% | 2927 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,737 psi | 86% | 2927 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,564 psi | 89% | 3015 fps | 100% |
| Norma MRPᴾ | <<locked>> | 100% | 47,993 psi | 77% | 3009 fps | 96.3% |
| Norma URP | <<locked>> | 96% | 53,548 psi | 86% | 3025 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 56,260 psi | 90% | 3041 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,014 psi | 90% | 3077 fps | 98.8% |
| Ramshot TAC | <<locked>> | 82% | 53,519 psi | 86% | 2946 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,229 psi | 85% | 2963 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1900 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,795 psi | 86% | 2956 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,287 psi | 85% | 3038 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,069 psi | 85% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,520 psi | 87% | 3064 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,505 psi | 86% | 3084 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 82% | 54,128 psi | 87% | 2907 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,751 psi | 86% | 2923 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,026 psi | 85% | 2963 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 52,997 psi | 85% | 2936 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,259 psi | 87% | 2963 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,520 psi | 87% | 2959 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,955 psi | 88% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,332 psi | 89% | 2999 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,563 psi | 87% | 3022 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,796 psi | 89% | 2982 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,275 psi | 90% | 3002 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,476 psi | 87% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,766 psi | 88% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,447 psi | 87% | 2913 fps | 97.7% |
| Somchem S335 | <<locked>> | 84% | 53,983 psi | 87% | 2861 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,201 psi | 89% | 2969 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 53,185 psi | 85% | 2959 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,651 psi | 89% | 3084 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,329 psi | 82% | 2959 fps | 96.6% |
| Vihtavuori N133 | <<locked>> | 84% | 54,824 psi | 88% | 2848 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,679 psi | 86% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,288 psi | 87% | 2904 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,636 psi | 88% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,159 psi | 90% | 3025 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 53,693 psi | 86% | 2930 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,999 psi | 90% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,042 psi | 88% | 3025 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,471 psi | 76% | 2959 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,217 psi | 90% | 2999 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,998 psi | 87% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,998 psi | 87% | 3038 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,319 psi | 61% | 2890 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,318 psi | 90% | 3012 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% | 51,793 psi | 83% | 2828 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,860 psi | 72% | 2756 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,127 psi | 84% | 2913 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,615 psi | 75% | 2782 fps | 95.1% |
| Accurate 3100 | <<locked>> | 96% | 39,436 psi | 63% | 2733 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 42,438 psi | 68% | 2749 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 36,129 psi | 58% | 2680 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,022 psi | 77% | 2871 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 40,698 psi | 65% | 2707 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,082 psi | 80% | 2874 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,865 psi | 82% | 2854 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,918 psi | 70% | 2907 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,756 psi | 65% | 2736 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,627 psi | 70% | 2802 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,678 psi | 54% | 2631 fps | 95% |
| Alliant Reloder-17 | 58.7 gr | 80% | 35,259 psi | 57% | 2703 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,227 psi | 50% | 2589 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,318 psi | 58% | 2782 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,355 psi | 76% | 2874 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 40,611 psi | 65% | 2743 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 46,673 psi | 75% | 2822 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,488 psi | 83% | 2861 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,327 psi | 79% | 2897 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,234 psi | 66% | 2746 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 44,005 psi | 71% | 2851 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 90% | 50,850 psi | 82% | 2936 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 48,486 psi | 78% | 2881 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,980 psi | 50% | 2526 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,730 psi | 72% | 2854 fps | 99.7% |
| Hodgdon Superformance | 69.8 gr | 90% | 46,775 psi | 75% | 2930 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 43% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,398 psi | 74% | 2828 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 48,486 psi | 78% | 2874 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,743 psi | 69% | 2746 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,194 psi | 72% | 2769 fps | 95.7% |
| IMR 4350 | <<locked>> | 92% | 47,094 psi | 76% | 2851 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,643 psi | 73% | 2802 fps | 95.7% |
| IMR 4831 | <<locked>> | 84% | 34,853 psi | 56% | 2631 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 44,730 psi | 72% | 2835 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 50,082 psi | 80% | 2874 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,616 psi | 76% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,645 psi | 76% | 2802 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 42,960 psi | 69% | 2753 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 39,958 psi | 64% | 2690 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 43,134 psi | 69% | 2776 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 47,065 psi | 75% | 2822 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 47,471 psi | 76% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,004 psi | 69% | 2789 fps | 98.9% |
| Norma MRP | <<locked>> | 98% | 44,686 psi | 72% | 2940 fps | 95.3% |
| Norma URP | <<locked>> | 84% | 36,129 psi | 58% | 2677 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 42,714 psi | 68% | 2802 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 40,263 psi | 65% | 2779 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 50,125 psi | 80% | 2887 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,734 psi | 80% | 2904 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,006 psi | 43% | 1699 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,481 psi | 67% | 2723 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,383 psi | 74% | 2917 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,492 psi | 60% | 2772 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,824 psi | 57% | 2694 fps | 95.4% |
| ReloadSwiss RS 70 | 64.1 gr | 86% | 38,072 psi | 61% | 2759 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 51,039 psi | 82% | 2861 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,759 psi | 72% | 2769 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 38,247 psi | 61% | 2684 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 46,673 psi | 75% | 2822 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,958 psi | 64% | 2690 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,616 psi | 76% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,960 psi | 69% | 2753 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 43,134 psi | 69% | 2776 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,146 psi | 63% | 2733 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,660 psi | 78% | 2864 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,470 psi | 75% | 2835 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,008 psi | 77% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,190 psi | 64% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,788 psi | 72% | 2743 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 47,877 psi | 77% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,167 psi | 77% | 2854 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 38,928 psi | 62% | 2687 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 28,442 psi | 46% | 2510 fps | 96.2% |
| Somchem S385 | <<locked>> | 98% | 48,066 psi | 77% | 2900 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 48,428 psi | 78% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,338 psi | 71% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,976 psi | 72% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,043 psi | 59% | 2618 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 35,346 psi | 57% | 2625 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 50,285 psi | 81% | 2874 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,366 psi | 70% | 2743 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 37,289 psi | 60% | 2684 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 90% | 33,968 psi | 54% | 2671 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,677 psi | 52% | 2539 fps | 96.8% |
| Winchester 748 | <<locked>> | 80% | 50,386 psi | 81% | 2920 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,005 psi | 71% | 2851 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,588 psi | 47% | 2615 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,137 psi | 74% | 2841 fps | 99.6% |
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 93 powders for .300 H&H Mag. loaded with the .308 | 155gr | Norma Kalahari. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,104 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 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 | Norma Kalahari 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.