Load Specifications
Load data in caliber .300 H&H Mag. with .308 | 125gr | X-TREME FMJ 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 Power Pro 2000-MR 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>> | 84% | 53,287 psi | 85% | 3166 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,332 psi | 89% | 3238 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,463 psi | 89% | 3235 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,751 psi | 86% | 3248 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 55,521 psi | 89% | 3284 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,608 psi | 89% | 3353 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 56,057 psi | 90% | 3314 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 92% | 53,592 psi | 86% | 3248 fps | 98.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,984 psi | 88% | 3264 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 55,477 psi | 89% | 3248 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,927 psi | 90% | 3435 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,432 psi | 86% | 3274 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,144 psi | 90% | 3228 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,215 psi | 87% | 3297 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,113 psi | 85% | 3350 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,578 psi | 88% | 3399 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,913 psi | 61% | 3018 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,985 psi | 90% | 3320 fps | 98.7% |
| Bofors RP3 | <<locked>> | 92% | 54,201 psi | 87% | 3291 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,447 psi | 86% | 3196 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,578 psi | 88% | 3294 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,347 psi | 90% | 3399 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 55,506 psi | 89% | 3268 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,187 psi | 88% | 3297 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 98% | 54,868 psi | 88% | 3340 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 86% | 53,055 psi | 85% | 3264 fps | 99.4% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,255 psi | 79% | 3212 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,043 psi | 90% | 3360 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 56% | 2073 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,476 psi | 87% | 3271 fps | 99.5% |
| IMR 3031 | <<locked>> | 88% | 56,304 psi | 90% | 3320 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,405 psi | 90% | 3291 fps | 99.2% |
| IMR 4198 | <<locked>> | 82% | 56,028 psi | 90% | 3186 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,318 psi | 90% | 3284 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,446 psi | 84% | 3278 fps | 98.2% |
| IMR 4895 | <<locked>> | 90% | 55,608 psi | 89% | 3337 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 54,984 psi | 88% | 3264 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 55,361 psi | 89% | 3248 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,898 psi | 90% | 3294 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,521 psi | 89% | 3235 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 56,318 psi | 90% | 3291 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 55,651 psi | 89% | 3274 fps | 97.4% |
| Norma 201 | <<locked>> | 88% | 54,766 psi | 88% | 3258 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 55,187 psi | 88% | 3264 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,403 psi | 86% | 3284 fps | 99.1% |
| Norma URPᴾ | <<locked>> | 100% | 54,273 psi | 87% | 3333 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 90% | 53,969 psi | 87% | 3304 fps | 99.1% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,534 psi | 86% | 3320 fps | 96.6% |
| Ramshot TAC | <<locked>> | 86% | 55,666 psi | 89% | 3271 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,158 psi | 88% | 3297 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,086 psi | 90% | 3261 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,636 psi | 57% | 2123 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,331 psi | 87% | 3245 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,738 psi | 89% | 3278 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,389 psi | 87% | 3369 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,157 psi | 87% | 3409 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,303 psi | 89% | 3369 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,317 psi | 89% | 3399 fps | 98% |
| Rottweil R 901 | <<locked>> | 86% | 55,521 psi | 89% | 3248 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,245 psi | 89% | 3255 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 94% | 54,056 psi | 87% | 3281 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,651 psi | 89% | 3274 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,898 psi | 90% | 3294 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,318 psi | 90% | 3291 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,927 psi | 90% | 3346 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,809 psi | 86% | 3241 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,520 psi | 87% | 3278 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,997 psi | 85% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,434 psi | 90% | 3192 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,231 psi | 90% | 3222 fps | 96.1% |
| Somchem S321 | <<locked>> | 82% | 52,852 psi | 85% | 3238 fps | 99.8% |
| Somchem S335 | <<locked>> | 88% | 55,724 psi | 89% | 3196 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,345 psi | 86% | 3238 fps | 99% |
| Somchem S355 | <<locked>> | 94% | 54,317 psi | 87% | 3278 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,675 psi | 78% | 3274 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 56,028 psi | 90% | 3169 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,214 psi | 85% | 3140 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,839 psi | 88% | 3228 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,724 psi | 89% | 3238 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,898 psi | 90% | 3258 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,519 psi | 86% | 3274 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 86% | 55,608 psi | 89% | 3264 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 90% | 54,143 psi | 87% | 3228 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 56,391 psi | 90% | 3340 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,234 psi | 66% | 3114 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,273 psi | 87% | 3255 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 55,535 psi | 89% | 3317 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,868 psi | 88% | 3340 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,404 psi | 87% | 3284 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% | 47,036 psi | 75% | 3058 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,605 psi | 83% | 3179 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,784 psi | 64% | 2956 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,804 psi | 75% | 3123 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 37,608 psi | 60% | 2933 fps | 99.2% |
| Accurate 4350 | <<locked>> | 92% | 41,669 psi | 67% | 3077 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 43,424 psi | 70% | 3064 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 39,320 psi | 63% | 2946 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,440 psi | 73% | 3081 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,513 psi | 73% | 3091 fps | 100% |
| Alliant Power Pro 2000-MR | 64.5 gr | 82% | 42,250 psi | 68% | 3143 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,376 psi | 58% | 2907 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,721 psi | 85% | 3173 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,189 psi | 63% | 2979 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 92% | 41,379 psi | 66% | 3094 fps | 95.4% |
| Alliant Reloder-17 | 65.1 gr | 84% | 36,100 psi | 58% | 2982 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 35,665 psi | 57% | 2956 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,699 psi | 68% | 3058 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 35,969 psi | 58% | 2904 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,239 psi | 76% | 3081 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,251 psi | 71% | 3094 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,776 psi | 78% | 3258 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 51,909 psi | 83% | 3209 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 42,293 psi | 68% | 3041 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 51,068 psi | 82% | 3271 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,787 psi | 70% | 3077 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 35,621 psi | 57% | 2907 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,697 psi | 64% | 3031 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 42% | 1857 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,032 psi | 67% | 3025 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 43,207 psi | 69% | 3087 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,595 psi | 62% | 2923 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,866 psi | 85% | 3136 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,055 psi | 85% | 3225 fps | 95.3% |
| IMR 4831 | <<locked>> | 92% | 40,089 psi | 64% | 3022 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 40,103 psi | 64% | 3018 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 45,440 psi | 73% | 3081 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 51,605 psi | 83% | 3186 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 42,467 psi | 68% | 3045 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 43,555 psi | 70% | 3002 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 38,609 psi | 62% | 2936 fps | 97.3% |
| Lovex S065 | <<locked>> | 92% | 46,282 psi | 74% | 3097 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 42,496 psi | 68% | 3018 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 42,699 psi | 68% | 3031 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 38,566 psi | 62% | 2966 fps | 95.9% |
| Norma URP | <<locked>> | 92% | 41,698 psi | 67% | 3077 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 38,014 psi | 61% | 2969 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 98% | 49,922 psi | 80% | 3255 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 45,513 psi | 73% | 3074 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,889 psi | 72% | 3097 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,269 psi | 79% | 3136 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 42% | 1900 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,908 psi | 82% | 3182 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 48,776 psi | 78% | 3146 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,915 psi | 66% | 3091 fps | 95.9% |
| ReloadSwiss RS 60 | 62 gr | 80% | 33,562 psi | 54% | 2920 fps | 96.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 41,553 psi | 67% | 3097 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,715 psi | 72% | 3176 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 46,311 psi | 74% | 3081 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 40,466 psi | 65% | 2963 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 36,172 psi | 58% | 2904 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 46,282 psi | 74% | 3097 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,467 psi | 68% | 3045 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 38,609 psi | 62% | 2936 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 37,246 psi | 60% | 2956 fps | 95.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,758 psi | 70% | 3041 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,945 psi | 67% | 3025 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,874 psi | 70% | 2982 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,448 psi | 58% | 2818 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,779 psi | 85% | 3159 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 49,356 psi | 79% | 3176 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 43,526 psi | 70% | 2982 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,482 psi | 70% | 3041 fps | 97.2% |
| Somchem S355 | <<locked>> | 80% | 34,722 psi | 56% | 2851 fps | 95% |
| Somchem S365 | <<locked>> | 88% | 32,619 psi | 52% | 2884 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 49,574 psi | 79% | 3068 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,150 psi | 71% | 2982 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,769 psi | 64% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,393 psi | 65% | 2956 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 32,938 psi | 53% | 2782 fps | 96% |
| Vihtavuori N160 | <<locked>> | 90% | 40,944 psi | 66% | 3022 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 45,469 psi | 73% | 3077 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 39,102 psi | 63% | 2936 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 43,076 psi | 69% | 3084 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 38,653 psi | 62% | 3051 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,998 psi | 58% | 2867 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 45,005 psi | 72% | 3120 fps | 99.3% |
| Winchester 760 | <<locked>> | 96% | 51,300 psi | 82% | 3274 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,408 psi | 66% | 3025 fps | 97.4% |
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 89 powders for .300 H&H Mag. loaded with the .308 | 125gr | X-TREME FMJ. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,435 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,435 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 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .300 H&H Mag. with the .308 | 125gr | X-TREME FMJ 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.