Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 140gr | Barnes X BT bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 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% | 56,260 psi | 90% | 3025 fps | 100% |
| Accurate 2495 | <<locked>> | 84% | 53,316 psi | 85% | 3012 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,795 psi | 86% | 3025 fps | 95.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,456 psi | 74% | 2986 fps | 96.1% |
| Accurate 4064 | <<locked>> | 86% | 53,258 psi | 85% | 3058 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,767 psi | 89% | 3182 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 84% | 55,143 psi | 88% | 3120 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 90% | 55,883 psi | 90% | 3117 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,737 psi | 86% | 3064 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,940 psi | 88% | 3048 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,360 psi | 87% | 3235 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,376 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,519 psi | 86% | 3110 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,854 psi | 90% | 3232 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,563 psi | 86% | 3209 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,685 psi | 70% | 3009 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,052 psi | 79% | 3186 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,737 psi | 88% | 3127 fps | 99.2% |
| Bofors RP3 | <<locked>> | 88% | 54,041 psi | 87% | 3114 fps | 99.9% |
| Bofors RP7 | <<locked>> | 92% | 53,751 psi | 86% | 3068 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,405 psi | 89% | 3051 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,635 psi | 86% | 3100 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,592 psi | 88% | 3117 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 94% | 54,070 psi | 87% | 3159 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 84% | 55,724 psi | 89% | 3133 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,912 psi | 90% | 3156 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,201 psi | 89% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,491 psi | 87% | 3192 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 58% | 1959 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,391 psi | 90% | 3130 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 55,898 psi | 90% | 3123 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,477 psi | 89% | 3100 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,114 psi | 88% | 3071 fps | 96.9% |
| IMR 4350 | <<locked>> | 96% | 53,751 psi | 86% | 3087 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,984 psi | 88% | 3097 fps | 96.8% |
| IMR 4831 | <<locked>> | 98% | 55,956 psi | 90% | 3169 fps | 99.3% |
| IMR 4895 | <<locked>> | 86% | 54,810 psi | 88% | 3146 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 82% | 53,737 psi | 86% | 3064 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,448 psi | 89% | 3100 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,070 psi | 87% | 3038 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 55,782 psi | 89% | 3104 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,274 psi | 89% | 3100 fps | 98.2% |
| Lovex S070 | <<locked>> | 96% | 56,130 psi | 90% | 3133 fps | 97.4% |
| Norma 201 | <<locked>> | 84% | 54,404 psi | 87% | 3071 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,563 psi | 87% | 3071 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,057 psi | 90% | 3153 fps | 99.8% |
| Norma URP | <<locked>> | 96% | 53,983 psi | 87% | 3156 fps | 99% |
| Ramshot Big Game | <<locked>> | 86% | 52,895 psi | 85% | 3117 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 98% | 56,275 psi | 90% | 3205 fps | 98.1% |
| Ramshot TAC | <<locked>> | 82% | 53,940 psi | 86% | 3074 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,838 psi | 86% | 3100 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 59% | 2005 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,563 psi | 87% | 3091 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,650 psi | 86% | 3176 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,171 psi | 85% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,027 psi | 88% | 3196 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,056 psi | 87% | 3215 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 82% | 55,666 psi | 89% | 3058 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,926 psi | 88% | 3068 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,085 psi | 87% | 3104 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 92% | 53,751 psi | 86% | 3068 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,274 psi | 89% | 3100 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,448 psi | 89% | 3100 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,782 psi | 89% | 3104 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,130 psi | 90% | 3133 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,042 psi | 88% | 3159 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,895 psi | 85% | 3054 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,330 psi | 86% | 3081 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,100 psi | 88% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,405 psi | 89% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,288 psi | 89% | 3045 fps | 97% |
| Somchem S335 | <<locked>> | 84% | 54,926 psi | 88% | 3002 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,854 psi | 90% | 3107 fps | 99.7% |
| Somchem S355 | <<locked>> | 90% | 54,186 psi | 87% | 3100 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,927 psi | 90% | 3222 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,230 psi | 89% | 2986 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,563 psi | 87% | 3038 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,824 psi | 88% | 3041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,245 psi | 89% | 3074 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,881 psi | 85% | 3097 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 82% | 54,317 psi | 87% | 3064 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,388 psi | 86% | 3041 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,753 psi | 89% | 3163 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,298 psi | 77% | 3094 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,362 psi | 90% | 3127 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,375 psi | 87% | 3117 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,317 psi | 87% | 3166 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,668 psi | 64% | 3022 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,461 psi | 86% | 3094 fps | 99.8% |
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% | 52,997 psi | 85% | 2976 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,282 psi | 76% | 2913 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,517 psi | 81% | 2966 fps | 95% |
| Accurate 3100 | <<locked>> | 98% | 43,642 psi | 70% | 2927 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 44,570 psi | 71% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 37,710 psi | 60% | 2822 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 48,805 psi | 78% | 3005 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 41,510 psi | 67% | 2838 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,647 psi | 81% | 3012 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 51,503 psi | 83% | 2999 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,730 psi | 72% | 3041 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,843 psi | 67% | 2874 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,628 psi | 72% | 2940 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 84% | 36,782 psi | 59% | 2818 fps | 95% |
| Alliant Reloder-17 | 60.1 gr | 80% | 36,361 psi | 58% | 2835 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 32,706 psi | 52% | 2723 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 40,176 psi | 64% | 2982 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,095 psi | 77% | 3009 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 42,061 psi | 67% | 2884 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 50,662 psi | 81% | 3009 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,054 psi | 83% | 2995 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,415 psi | 81% | 3041 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,598 psi | 68% | 2881 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 47,703 psi | 76% | 3041 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 49,284 psi | 79% | 3018 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 32,271 psi | 52% | 2657 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,455 psi | 73% | 2989 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 50,908 psi | 82% | 3123 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 43% | 1752 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,934 psi | 75% | 2959 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 49,284 psi | 79% | 3015 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,613 psi | 70% | 2877 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 48,791 psi | 78% | 2953 fps | 95.5% |
| IMR 4350 | <<locked>> | 94% | 50,720 psi | 81% | 3035 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,008 psi | 79% | 2986 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 38,479 psi | 62% | 2825 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 45,658 psi | 73% | 2969 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 50,647 psi | 81% | 3012 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 48,950 psi | 78% | 2992 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,341 psi | 78% | 2933 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 44,237 psi | 71% | 2894 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 43,830 psi | 70% | 2881 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 47,079 psi | 75% | 2966 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 48,356 psi | 78% | 2963 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 48,399 psi | 78% | 2966 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,019 psi | 71% | 2927 fps | 98.4% |
| Norma URP | <<locked>> | 84% | 37,260 psi | 60% | 2812 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 43,671 psi | 70% | 2940 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 43,801 psi | 70% | 2966 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 50,705 psi | 81% | 3015 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,328 psi | 81% | 3038 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 44% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,252 psi | 73% | 2913 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,152 psi | 76% | 3054 fps | 98.4% |
| ReloadSwiss RS 60 | 60.1 gr | 80% | 38,479 psi | 62% | 2907 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 39,595 psi | 63% | 2890 fps | 95.6% |
| ReloadSwiss RS 70 | 67.2 gr | 88% | 41,727 psi | 67% | 2956 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 52,533 psi | 84% | 3009 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,209 psi | 74% | 2913 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 39,784 psi | 64% | 2825 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 50,662 psi | 81% | 3009 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,830 psi | 70% | 2881 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,950 psi | 78% | 2992 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,237 psi | 71% | 2894 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 47,079 psi | 75% | 2966 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,074 psi | 64% | 2864 fps | 97.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,617 psi | 80% | 2995 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,239 psi | 76% | 2972 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,994 psi | 79% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,162 psi | 66% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,820 psi | 78% | 2930 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 48,907 psi | 78% | 2907 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,052 psi | 79% | 2989 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 40,263 psi | 65% | 2828 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 29,950 psi | 48% | 2648 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,168 psi | 79% | 2894 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,542 psi | 73% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,847 psi | 74% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,305 psi | 61% | 2756 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 38,783 psi | 62% | 2812 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 50,923 psi | 82% | 3009 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 44,440 psi | 71% | 2884 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 38,421 psi | 62% | 2815 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 90% | 35,476 psi | 57% | 2812 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,924 psi | 54% | 2667 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 50,995 psi | 82% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 47,703 psi | 76% | 3041 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 32,982 psi | 53% | 2812 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,891 psi | 75% | 2976 fps | 99.2% |
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 89 powders for .300 H&H Mag. loaded with the .308 | 140gr | Barnes X BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,235 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 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 140.0 gr projectile in 0.308" calls for a 1:13.5 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 H&H Mag. with the .308 | 140gr | Barnes X BT 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.