Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 125gr | Hornady SST 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 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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>> | 86% | 56,318 psi | 90% | 3212 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,071 psi | 88% | 3235 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,129 psi | 88% | 3232 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,476 psi | 86% | 3241 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 54,969 psi | 88% | 3274 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,853 psi | 88% | 3337 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 88% | 55,521 psi | 89% | 3304 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 92% | 53,330 psi | 86% | 3241 fps | 98.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,708 psi | 88% | 3258 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 55,114 psi | 88% | 3245 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,188 psi | 90% | 3376 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,434 psi | 89% | 3425 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,200 psi | 85% | 3268 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,767 psi | 89% | 3219 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,708 psi | 86% | 3287 fps | 98.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,663 psi | 84% | 3340 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,143 psi | 87% | 3389 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,796 psi | 89% | 3314 fps | 98.7% |
| Bofors RP3 | <<locked>> | 92% | 53,679 psi | 86% | 3281 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,405 psi | 90% | 3245 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,114 psi | 87% | 3284 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,086 psi | 90% | 3389 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 55,187 psi | 88% | 3261 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,752 psi | 88% | 3287 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 88% | 56,115 psi | 90% | 3317 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,023 psi | 79% | 3205 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,782 psi | 89% | 3353 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,085 psi | 56% | 2070 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,954 psi | 87% | 3261 fps | 99.4% |
| IMR 3031 | <<locked>> | 88% | 55,985 psi | 90% | 3314 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,202 psi | 90% | 3284 fps | 99.1% |
| IMR 4198 | <<locked>> | 82% | 55,666 psi | 89% | 3179 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,086 psi | 90% | 3278 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,982 psi | 83% | 3268 fps | 98% |
| IMR 4895 | <<locked>> | 90% | 55,071 psi | 88% | 3327 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 86% | 54,708 psi | 88% | 3258 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 54,824 psi | 88% | 3238 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,347 psi | 89% | 3281 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,288 psi | 89% | 3228 fps | 99.3% |
| Lovex S062 | <<locked>> | 92% | 55,782 psi | 89% | 3281 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 55,230 psi | 89% | 3264 fps | 97.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,362 psi | 90% | 3301 fps | 96.4% |
| Norma 201 | <<locked>> | 88% | 54,259 psi | 87% | 3245 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 54,897 psi | 88% | 3255 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,881 psi | 85% | 3274 fps | 99% |
| Norma URPᴾ | <<locked>> | 100% | 54,114 psi | 87% | 3327 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 90% | 53,476 psi | 86% | 3294 fps | 99% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,924 psi | 85% | 3310 fps | 96.4% |
| Ramshot TAC | <<locked>> | 86% | 55,187 psi | 88% | 3261 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,708 psi | 88% | 3287 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,854 psi | 90% | 3255 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,549 psi | 57% | 2116 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,041 psi | 87% | 3238 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,288 psi | 89% | 3264 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,114 psi | 87% | 3360 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,693 psi | 86% | 3396 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,795 psi | 88% | 3360 fps | 98.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,708 psi | 88% | 3383 fps | 97.8% |
| Rottweil R 901 | <<locked>> | 86% | 55,187 psi | 88% | 3238 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,752 psi | 88% | 3245 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 94% | 53,534 psi | 86% | 3271 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,230 psi | 89% | 3264 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,347 psi | 89% | 3281 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,782 psi | 89% | 3281 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,362 psi | 90% | 3301 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,448 psi | 89% | 3337 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,563 psi | 86% | 3235 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,259 psi | 87% | 3271 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,854 psi | 90% | 3192 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,188 psi | 90% | 3186 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,811 psi | 89% | 3212 fps | 96% |
| Somchem S321 | <<locked>> | 84% | 56,130 psi | 90% | 3294 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 55,187 psi | 88% | 3186 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,142 psi | 85% | 3232 fps | 99% |
| Somchem S355 | <<locked>> | 94% | 53,809 psi | 86% | 3268 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,225 psi | 77% | 3264 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 55,709 psi | 89% | 3163 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,970 psi | 90% | 3179 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,288 psi | 87% | 3219 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,492 psi | 89% | 3232 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,390 psi | 89% | 3248 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,040 psi | 85% | 3268 fps | 98% |
| Vihtavuori N530 | <<locked>> | 86% | 55,303 psi | 89% | 3258 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 90% | 53,635 psi | 86% | 3219 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,651 psi | 89% | 3327 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,785 psi | 65% | 3104 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,693 psi | 86% | 3245 fps | 99.6% |
| Winchester 748 | <<locked>> | 86% | 54,998 psi | 88% | 3307 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,114 psi | 87% | 3278 fps | 99.5% |
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% | 46,673 psi | 75% | 3051 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,314 psi | 82% | 3169 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,436 psi | 63% | 2946 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,499 psi | 75% | 3117 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 37,275 psi | 60% | 2927 fps | 99.2% |
| Accurate 4350 | <<locked>> | 92% | 41,379 psi | 66% | 3071 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 43,134 psi | 69% | 3058 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 39,059 psi | 63% | 2940 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,165 psi | 72% | 3077 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 45,121 psi | 72% | 3081 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,721 psi | 85% | 3314 fps | 99.3% |
| Alliant Power Pro 2000-MR | 64.1 gr | 82% | 42,018 psi | 67% | 3133 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,085 psi | 58% | 2897 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,576 psi | 84% | 3169 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,885 psi | 62% | 2972 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 41,002 psi | 66% | 3081 fps | 95.2% |
| Alliant Reloder-17 | 64.6 gr | 84% | 35,752 psi | 57% | 2966 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,264 psi | 68% | 3045 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 35,694 psi | 57% | 2897 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,949 psi | 75% | 3071 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,947 psi | 70% | 3087 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,501 psi | 78% | 3251 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 80% | 51,561 psi | 83% | 3202 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 44,773 psi | 72% | 3094 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 43,497 psi | 70% | 3071 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 35,389 psi | 57% | 2897 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,436 psi | 63% | 3022 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 42% | 1854 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,742 psi | 67% | 3015 fps | 97.3% |
| IMR 3031 | <<locked>> | 80% | 42,859 psi | 69% | 3081 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,464 psi | 62% | 2920 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,504 psi | 84% | 3130 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,591 psi | 84% | 3212 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 42,467 psi | 68% | 3077 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 39,813 psi | 64% | 3009 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,165 psi | 72% | 3077 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 51,343 psi | 82% | 3179 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 42,192 psi | 68% | 3035 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 43,279 psi | 69% | 2995 fps | 97.3% |
| Lovex S062 | <<locked>> | 80% | 38,305 psi | 61% | 2927 fps | 97.2% |
| Lovex S065 | <<locked>> | 92% | 45,832 psi | 73% | 3084 fps | 95% |
| Lovex S070 | <<locked>> | 98% | 52,750 psi | 85% | 3238 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 42,192 psi | 68% | 3009 fps | 98.2% |
| Norma 202 | <<locked>> | 80% | 42,395 psi | 68% | 3025 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 38,276 psi | 61% | 2959 fps | 95.7% |
| Norma URP | <<locked>> | 92% | 41,263 psi | 66% | 3068 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,797 psi | 61% | 2963 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 98% | 49,545 psi | 79% | 3241 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 45,252 psi | 73% | 3064 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,585 psi | 71% | 3091 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,834 psi | 78% | 3127 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 42% | 1900 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,604 psi | 81% | 3176 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,808 psi | 83% | 3205 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,611 psi | 65% | 3081 fps | 95.7% |
| ReloadSwiss RS 60 | 61.5 gr | 80% | 33,185 psi | 53% | 2910 fps | 96.7% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,092 psi | 71% | 3153 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,616 psi | 76% | 3241 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 45,963 psi | 74% | 3071 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 40,219 psi | 64% | 2953 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 35,897 psi | 58% | 2894 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,832 psi | 73% | 3084 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,192 psi | 68% | 3035 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 38,305 psi | 61% | 2927 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 52,750 psi | 85% | 3238 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,999 psi | 59% | 2946 fps | 95.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,526 psi | 70% | 3035 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,640 psi | 67% | 3015 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,598 psi | 70% | 2976 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,143 psi | 58% | 2812 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,388 psi | 84% | 3153 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 48,863 psi | 78% | 3163 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 43,221 psi | 69% | 2972 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 43,004 psi | 69% | 3031 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 36,695 psi | 59% | 2904 fps | 95.8% |
| Somchem S365 | <<locked>> | 88% | 32,387 psi | 52% | 2874 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,226 psi | 79% | 3061 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,830 psi | 70% | 2972 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,421 psi | 63% | 2946 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,103 psi | 64% | 2946 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 32,706 psi | 52% | 2772 fps | 95.9% |
| Vihtavuori N160 | <<locked>> | 92% | 43,410 psi | 70% | 3077 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,179 psi | 72% | 3071 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,856 psi | 62% | 2930 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 92% | 42,627 psi | 68% | 3071 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 98% | 38,218 psi | 61% | 3038 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,810 psi | 57% | 2861 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 44,730 psi | 72% | 3114 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,133 psi | 66% | 3018 fps | 97.3% |
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 | 125gr | Hornady SST. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,425 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,425 fps. Accurate 4350 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 56–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for .300 H&H Mag. with the .308 | 125gr | Hornady SST 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.