
Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 135gr | Sierra HPBT MatchKing bullet and 93 powders. The key underlying parameters are shown in the table above.
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% | 53,098 psi | 85% | 3054 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,390 psi | 89% | 3127 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,403 psi | 86% | 3140 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,491 psi | 87% | 3110 fps | 95.8% |
| Accurate 4064 | <<locked>> | 90% | 55,579 psi | 89% | 3176 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,811 psi | 89% | 3258 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 86% | 55,709 psi | 89% | 3209 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 90% | 53,403 psi | 86% | 3150 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,578 psi | 88% | 3156 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,593 psi | 89% | 3140 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,564 psi | 89% | 3330 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,316 psi | 85% | 3169 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,056 psi | 87% | 3196 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,229 psi | 85% | 3258 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,418 psi | 87% | 3297 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,669 psi | 65% | 3009 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,948 psi | 74% | 3186 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,622 psi | 89% | 3215 fps | 99.2% |
| Bofors RP3 | <<locked>> | 90% | 54,172 psi | 87% | 3189 fps | 99.9% |
| Bofors RP7 | <<locked>> | 94% | 54,114 psi | 87% | 3146 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,101 psi | 90% | 3140 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,027 psi | 87% | 3179 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,144 psi | 90% | 3291 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 90% | 55,042 psi | 88% | 3199 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 96% | 54,708 psi | 88% | 3245 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 86% | 56,333 psi | 90% | 3222 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,881 psi | 85% | 3179 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,014 psi | 90% | 3255 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,579 psi | 89% | 3281 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,520 psi | 57% | 2008 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,056 psi | 87% | 3166 fps | 99.8% |
| IMR 3031 | <<locked>> | 86% | 56,231 psi | 90% | 3205 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,260 psi | 90% | 3189 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,115 psi | 90% | 3163 fps | 97% |
| IMR 4350 | <<locked>> | 98% | 54,607 psi | 88% | 3176 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,115 psi | 90% | 3186 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,289 psi | 90% | 3248 fps | 99.3% |
| IMR 4895 | <<locked>> | 88% | 55,448 psi | 89% | 3232 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 84% | 54,578 psi | 88% | 3156 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,608 psi | 89% | 3182 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,940 psi | 88% | 3127 fps | 99.7% |
| Lovex S062 | <<locked>> | 90% | 56,014 psi | 90% | 3182 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,390 psi | 89% | 3176 fps | 98.1% |
| Lovex S070 | <<locked>> | 96% | 53,040 psi | 85% | 3153 fps | 96.7% |
| Norma 201 | <<locked>> | 86% | 54,389 psi | 87% | 3150 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,868 psi | 88% | 3153 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,272 psi | 85% | 3182 fps | 99.6% |
| Norma URP | <<locked>> | 98% | 54,665 psi | 88% | 3241 fps | 99% |
| Ramshot Big Game | <<locked>> | 88% | 53,766 psi | 86% | 3202 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 98% | 53,417 psi | 86% | 3225 fps | 97.5% |
| Ramshot TAC | <<locked>> | 84% | 54,998 psi | 88% | 3166 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,694 psi | 88% | 3189 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,405 psi | 89% | 3153 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,027 psi | 58% | 2054 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,230 psi | 89% | 3176 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,230 psi | 87% | 3261 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,215 psi | 87% | 3304 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,434 psi | 89% | 3274 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,969 psi | 88% | 3304 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 84% | 55,303 psi | 89% | 3136 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,882 psi | 88% | 3146 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,027 psi | 87% | 3179 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 94% | 54,114 psi | 87% | 3146 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,390 psi | 89% | 3176 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,608 psi | 89% | 3182 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,014 psi | 90% | 3182 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 53,040 psi | 85% | 3153 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,695 psi | 89% | 3241 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,345 psi | 86% | 3140 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,056 psi | 87% | 3169 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,695 psi | 89% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,130 psi | 90% | 3084 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,724 psi | 89% | 3123 fps | 96.9% |
| Somchem S321 | <<locked>> | 82% | 55,825 psi | 90% | 3186 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,245 psi | 89% | 3084 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,924 psi | 85% | 3130 fps | 99.5% |
| Somchem S355 | <<locked>> | 92% | 54,186 psi | 87% | 3176 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,576 psi | 84% | 3245 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 55,332 psi | 89% | 3051 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,956 psi | 90% | 3074 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,650 psi | 88% | 3117 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,405 psi | 89% | 3130 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,666 psi | 89% | 3153 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,563 psi | 86% | 3182 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 84% | 55,129 psi | 88% | 3156 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,838 psi | 86% | 3120 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,130 psi | 90% | 3241 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,860 psi | 72% | 3097 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,896 psi | 86% | 3156 fps | 99.9% |
| Winchester 748 | <<locked>> | 84% | 55,158 psi | 88% | 3205 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,955 psi | 88% | 3251 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,608 psi | 59% | 2999 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,983 psi | 87% | 3176 fps | 99.8% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 49,690 psi | 80% | 3002 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,554 psi | 68% | 2910 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,777 psi | 80% | 3077 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,923 psi | 82% | 3048 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 40,205 psi | 64% | 2897 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 39,291 psi | 63% | 2933 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 45,919 psi | 74% | 3025 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 39,073 psi | 63% | 2851 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,993 psi | 77% | 3035 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 48,573 psi | 78% | 3031 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,018 psi | 67% | 3048 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,885 psi | 62% | 2877 fps | 97.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,626 psi | 67% | 2946 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 38,856 psi | 62% | 2943 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,591 psi | 54% | 2825 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,707 psi | 54% | 2822 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,682 psi | 64% | 3035 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,310 psi | 73% | 3025 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 38,638 psi | 62% | 2881 fps | 97.8% |
| Bofors RP7 | <<locked>> | 92% | 50,952 psi | 82% | 3091 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,617 psi | 80% | 3028 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,224 psi | 76% | 3058 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,286 psi | 84% | 3222 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 39,363 psi | 63% | 2881 fps | 95% |
| Hodgdon H414 | <<locked>> | 92% | 47,935 psi | 77% | 3117 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 46,340 psi | 74% | 3038 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 33,518 psi | 54% | 2762 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,598 psi | 68% | 3002 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 94% | 51,750 psi | 83% | 3212 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,426 psi | 42% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,454 psi | 71% | 2982 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 46,108 psi | 74% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,017 psi | 66% | 2894 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 49,429 psi | 79% | 3038 fps | 95.5% |
| IMR 4350 | <<locked>> | 96% | 51,227 psi | 82% | 3114 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 49,429 psi | 79% | 3064 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 37,695 psi | 60% | 2877 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 42,641 psi | 68% | 2982 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 47,993 psi | 77% | 3035 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 45,295 psi | 73% | 3002 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 45,788 psi | 73% | 2959 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 40,988 psi | 66% | 2900 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 43,250 psi | 69% | 2940 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 46,847 psi | 75% | 3035 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 44,962 psi | 72% | 2976 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 45,469 psi | 73% | 2989 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,017 psi | 66% | 2933 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 39,146 psi | 63% | 2927 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 40,756 psi | 65% | 2946 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 92% | 43,714 psi | 70% | 3035 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 48,153 psi | 77% | 3038 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,732 psi | 77% | 3064 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,822 psi | 83% | 3091 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 43% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,411 psi | 73% | 2989 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,121 psi | 71% | 3064 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,752 psi | 57% | 2904 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 39,015 psi | 63% | 2946 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,684 psi | 67% | 3022 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 49,081 psi | 79% | 3031 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,844 psi | 69% | 2923 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,303 psi | 58% | 2818 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 50,952 psi | 82% | 3091 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,250 psi | 69% | 2940 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,295 psi | 73% | 3002 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 40,988 psi | 66% | 2900 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 92% | 46,847 psi | 75% | 3035 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,333 psi | 60% | 2871 fps | 96.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,412 psi | 74% | 3009 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,599 psi | 72% | 2989 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,238 psi | 74% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,551 psi | 62% | 2776 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 49,037 psi | 79% | 3005 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 52,170 psi | 84% | 3123 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 45,861 psi | 74% | 2927 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,108 psi | 74% | 3005 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 36,999 psi | 59% | 2822 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 30,676 psi | 49% | 2743 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 52,069 psi | 83% | 3002 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,572 psi | 75% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,351 psi | 68% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,004 psi | 69% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,288 psi | 57% | 2756 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 86% | 38,392 psi | 62% | 2874 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 48,283 psi | 77% | 3035 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 41,466 psi | 66% | 2897 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 40,495 psi | 65% | 2936 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 36,564 psi | 59% | 2910 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 33,431 psi | 54% | 2723 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 48,109 psi | 77% | 3084 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 48,153 psi | 77% | 3120 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 34,171 psi | 55% | 2920 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,019 psi | 71% | 2989 fps | 98.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 111 powders for .300 H&H Mag. loaded with the .308 | 135gr | Sierra HPBT MatchKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,330 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 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 135.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.