Load Specifications
Load data in caliber .300 H&H Mag. with .307 | 150gr | Rhino Penetrator bullet and 92 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.
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 2015 | <<locked>> | 82% | 54,230 psi | 87% | 2910 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,301 psi | 85% | 2933 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,868 psi | 88% | 3002 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,840 psi | 90% | 2986 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,135 psi | 71% | 2871 fps | 96.2% |
| Accurate 4064 | <<locked>> | 88% | 53,490 psi | 86% | 2982 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,534 psi | 86% | 3068 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 84% | 53,592 psi | 86% | 3015 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 54,578 psi | 88% | 3012 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,941 psi | 90% | 3015 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,505 psi | 86% | 2943 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,200 psi | 85% | 3130 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,679 psi | 88% | 3035 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,361 psi | 89% | 3061 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,534 psi | 87% | 3127 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,825 psi | 90% | 3166 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,858 psi | 67% | 2900 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,224 psi | 76% | 3074 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,403 psi | 86% | 3025 fps | 99.4% |
| Bofors RP3 | <<locked>> | 90% | 55,637 psi | 89% | 3054 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,492 psi | 89% | 3022 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,056 psi | 87% | 2946 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,463 psi | 89% | 3045 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 52,750 psi | 85% | 3005 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 96% | 56,362 psi | 90% | 3120 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 92% | 53,171 psi | 85% | 3022 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 84% | 54,186 psi | 87% | 3025 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,404 psi | 87% | 3048 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,766 psi | 86% | 3058 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,055 psi | 85% | 3091 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 57% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,317 psi | 89% | 3028 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,273 psi | 87% | 3009 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,215 psi | 87% | 2999 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,940 psi | 86% | 2972 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 55,767 psi | 89% | 3045 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,824 psi | 86% | 2995 fps | 97.2% |
| IMR 4831 | <<locked>> | 98% | 54,143 psi | 87% | 3061 fps | 99.5% |
| IMR 4895 | <<locked>> | 86% | 53,287 psi | 85% | 3035 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 55,941 psi | 90% | 3015 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,519 psi | 86% | 2989 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,202 psi | 90% | 2992 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 54,056 psi | 87% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,505 psi | 86% | 2995 fps | 98.4% |
| Lovex S070 | <<locked>> | 96% | 54,476 psi | 87% | 3028 fps | 97.7% |
| Norma 201 | <<locked>> | 86% | 55,564 psi | 89% | 3009 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,376 psi | 90% | 3012 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,578 psi | 88% | 3048 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 56,173 psi | 90% | 3110 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 55,172 psi | 88% | 3071 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 54,984 psi | 88% | 3104 fps | 98.4% |
| Ramshot TAC | <<locked>> | 84% | 56,188 psi | 90% | 3035 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,941 psi | 90% | 3054 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 58% | 1932 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,113 psi | 85% | 2989 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,825 psi | 90% | 3130 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,695 psi | 89% | 3166 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,185 psi | 85% | 3084 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,362 psi | 90% | 3176 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 53,388 psi | 86% | 2943 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,086 psi | 90% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,477 psi | 89% | 3045 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,492 psi | 89% | 3022 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,505 psi | 86% | 2995 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,519 psi | 86% | 2989 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,056 psi | 87% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,476 psi | 87% | 3028 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,447 psi | 86% | 3048 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,810 psi | 88% | 3012 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,303 psi | 89% | 3035 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,476 psi | 86% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,925 psi | 86% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,417 psi | 86% | 2940 fps | 97.2% |
| Somchem S335 | <<locked>> | 86% | 56,333 psi | 90% | 2943 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,447 psi | 87% | 3002 fps | 99.8% |
| Somchem S355 | <<locked>> | 92% | 55,680 psi | 89% | 3041 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 3110 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2982 fps | 96% |
| Vihtavuori N133 | <<locked>> | 84% | 53,824 psi | 86% | 2881 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,101 psi | 90% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,374 psi | 86% | 2940 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,650 psi | 86% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,926 psi | 88% | 3051 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 56,405 psi | 90% | 3015 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,013 psi | 88% | 2982 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,085 psi | 87% | 3054 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,238 psi | 74% | 2979 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,274 psi | 89% | 3028 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,779 psi | 85% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,362 psi | 90% | 3120 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,579 psi | 60% | 2904 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,564 psi | 89% | 3045 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% | 51,039 psi | 82% | 2864 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,845 psi | 70% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,213 psi | 82% | 2946 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 48,820 psi | 78% | 2864 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 41,162 psi | 66% | 2808 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 41,466 psi | 66% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,331 psi | 57% | 2700 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 47,036 psi | 75% | 2894 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 40,059 psi | 64% | 2736 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,139 psi | 79% | 2907 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 49,966 psi | 80% | 2890 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,120 psi | 69% | 2930 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,885 psi | 64% | 2759 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,714 psi | 68% | 2825 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 35,114 psi | 56% | 2710 fps | 95.2% |
| Alliant Reloder-17 | 59.1 gr | 80% | 34,606 psi | 55% | 2723 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,576 psi | 52% | 2664 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 38,174 psi | 61% | 2867 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,514 psi | 75% | 2900 fps | 98.5% |
| Bofors RP3 | <<locked>> | 80% | 39,871 psi | 64% | 2766 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 48,892 psi | 78% | 2904 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,821 psi | 81% | 2894 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,399 psi | 78% | 2930 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,553 psi | 65% | 2769 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 45,992 psi | 74% | 2933 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 90% | 49,922 psi | 80% | 2963 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 47,529 psi | 76% | 2910 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,400 psi | 49% | 2546 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,685 psi | 70% | 2877 fps | 99.4% |
| Hodgdon Superformance | 70.3 gr | 90% | 45,963 psi | 74% | 2956 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 43% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,701 psi | 73% | 2858 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 47,471 psi | 76% | 2904 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,090 psi | 67% | 2772 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,556 psi | 71% | 2795 fps | 95.1% |
| IMR 4350 | <<locked>> | 94% | 49,211 psi | 79% | 2930 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,715 psi | 72% | 2825 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 36,477 psi | 58% | 2713 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 43,787 psi | 70% | 2858 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 49,139 psi | 79% | 2907 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 46,760 psi | 75% | 2877 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,833 psi | 75% | 2828 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 42,105 psi | 68% | 2779 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 39,305 psi | 63% | 2713 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 45,078 psi | 72% | 2858 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 46,166 psi | 74% | 2848 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 46,514 psi | 75% | 2854 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,105 psi | 68% | 2815 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 35,375 psi | 57% | 2697 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 41,901 psi | 67% | 2828 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 42,047 psi | 67% | 2858 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 49,110 psi | 79% | 2910 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,907 psi | 78% | 2933 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 43% | 1729 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,613 psi | 70% | 2812 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,498 psi | 73% | 2943 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,796 psi | 59% | 2795 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 37,565 psi | 60% | 2779 fps | 95.7% |
| ReloadSwiss RS 70 | 66 gr | 88% | 39,914 psi | 64% | 2844 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 50,125 psi | 80% | 2890 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,903 psi | 70% | 2795 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,362 psi | 60% | 2707 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 48,892 psi | 78% | 2904 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,305 psi | 63% | 2713 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,760 psi | 75% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,105 psi | 68% | 2779 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 45,078 psi | 72% | 2858 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,392 psi | 62% | 2756 fps | 97.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,616 psi | 76% | 2884 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,687 psi | 73% | 2864 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,413 psi | 76% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,610 psi | 64% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,990 psi | 71% | 2769 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 46,992 psi | 75% | 2795 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,326 psi | 76% | 2881 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 38,058 psi | 61% | 2710 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 27,746 psi | 44% | 2523 fps | 95.4% |
| Somchem S385 | <<locked>> | 98% | 47,181 psi | 76% | 2923 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 47,776 psi | 77% | 2792 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,656 psi | 70% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,077 psi | 71% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,230 psi | 58% | 2641 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 37,043 psi | 59% | 2703 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 49,545 psi | 79% | 2904 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 42,627 psi | 68% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,376 psi | 58% | 2700 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 90% | 33,127 psi | 53% | 2687 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,111 psi | 51% | 2559 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 49,516 psi | 79% | 2953 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,195 psi | 74% | 2940 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,922 psi | 50% | 2694 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,281 psi | 73% | 2867 fps | 99.4% |
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 92 powders for .300 H&H Mag. loaded with the .307 | 150gr | Rhino Penetrator. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,176 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 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 150.0 gr projectile in 0.307" calls for a 1:13.0 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 .307 | 150gr | Rhino Penetrator 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.