Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 125gr | Sierra Pro-Hunter 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% | 54,679 psi | 88% | 3222 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,998 psi | 87% | 3241 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,838 psi | 86% | 3294 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 54,157 psi | 87% | 3294 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,505 psi | 87% | 3369 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 84% | 53,998 psi | 87% | 3320 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 90% | 55,100 psi | 88% | 3317 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,289 psi | 90% | 3327 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,824 psi | 86% | 3251 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,795 psi | 86% | 3438 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,274 psi | 89% | 3343 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,796 psi | 89% | 3366 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,259 psi | 89% | 3435 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,055 psi | 85% | 3409 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,656 psi | 68% | 3179 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 3369 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,998 psi | 87% | 3327 fps | 99% |
| Bofors RP3 | <<locked>> | 90% | 56,217 psi | 90% | 3360 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,144 psi | 90% | 3323 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,230 psi | 87% | 3248 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,101 psi | 90% | 3353 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 56,072 psi | 90% | 3314 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,447 psi | 86% | 3307 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 92% | 55,129 psi | 88% | 3389 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 54,549 psi | 87% | 3333 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,419 psi | 89% | 3356 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,549 psi | 87% | 3366 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 94% | 54,201 psi | 87% | 3392 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 57% | 2129 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,650 psi | 88% | 3314 fps | 99.8% |
| IMR 3031 | <<locked>> | 86% | 53,040 psi | 85% | 3297 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,838 psi | 86% | 3287 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,084 psi | 85% | 3248 fps | 96.3% |
| IMR 4350 | <<locked>> | 96% | 53,243 psi | 85% | 3287 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,520 psi | 87% | 3297 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,127 psi | 84% | 3310 fps | 98.7% |
| IMR 4895 | <<locked>> | 86% | 53,751 psi | 86% | 3340 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 84% | 56,289 psi | 90% | 3327 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,838 psi | 86% | 3294 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,171 psi | 85% | 3238 fps | 99.5% |
| Lovex S062 | <<locked>> | 88% | 54,563 psi | 87% | 3301 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,027 psi | 87% | 3287 fps | 97.8% |
| Lovex S070 | <<locked>> | 96% | 55,274 psi | 89% | 3330 fps | 97.1% |
| Norma 201 | <<locked>> | 86% | 56,159 psi | 90% | 3320 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,330 psi | 86% | 3268 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,056 psi | 88% | 3350 fps | 99.7% |
| Norma URP | <<locked>> | 96% | 53,476 psi | 86% | 3353 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 88% | 56,014 psi | 90% | 3376 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 55,912 psi | 90% | 3406 fps | 97.9% |
| Ramshot TAC | <<locked>> | 82% | 53,171 psi | 85% | 3274 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,823 psi | 85% | 3294 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,027 psi | 58% | 2175 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,664 psi | 86% | 3287 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,721 psi | 85% | 3373 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,634 psi | 84% | 3415 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,302 psi | 87% | 3386 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,679 psi | 86% | 3415 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 82% | 53,476 psi | 86% | 3248 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,287 psi | 85% | 3261 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 92% | 56,072 psi | 90% | 3350 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 56,144 psi | 90% | 3323 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,027 psi | 87% | 3287 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,838 psi | 86% | 3294 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,563 psi | 87% | 3301 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,274 psi | 89% | 3330 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,288 psi | 87% | 3353 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,259 psi | 89% | 3314 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,072 psi | 90% | 3343 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,925 psi | 86% | 3202 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,578 psi | 88% | 3199 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,157 psi | 87% | 3232 fps | 96.6% |
| Somchem S335 | <<locked>> | 84% | 53,505 psi | 86% | 3196 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,042 psi | 88% | 3307 fps | 99.6% |
| Somchem S355 | <<locked>> | 92% | 56,202 psi | 90% | 3350 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,419 psi | 89% | 3422 fps | 100% |
| Unknown powder | <<locked>> | 94% | 54,259 psi | 87% | 3363 fps | 98.4% |
| Vihtavuori N130 | <<locked>> | 82% | 55,666 psi | 89% | 3202 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,722 psi | 86% | 3186 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,069 psi | 85% | 3232 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 52,997 psi | 85% | 3232 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,230 psi | 87% | 3274 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,911 psi | 88% | 3333 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 82% | 55,840 psi | 90% | 3333 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,997 psi | 85% | 3258 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,114 psi | 88% | 3383 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,369 psi | 76% | 3274 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,173 psi | 90% | 3327 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,129 psi | 88% | 3389 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,421 psi | 62% | 3173 fps | 98.3% |
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% | 51,242 psi | 82% | 3166 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,179 psi | 71% | 3071 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,256 psi | 81% | 3228 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 41,742 psi | 67% | 3058 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 38,247 psi | 61% | 3028 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 47,355 psi | 76% | 3189 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,205 psi | 64% | 3009 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,429 psi | 79% | 3202 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 50,241 psi | 81% | 3196 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,627 psi | 70% | 3222 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,205 psi | 64% | 3035 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,018 psi | 69% | 3110 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 37,768 psi | 61% | 3041 fps | 95% |
| Alliant Reloder-17 | 68 gr | 80% | 34,896 psi | 56% | 2986 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 35,128 psi | 56% | 2979 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,771 psi | 67% | 3212 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,065 psi | 75% | 3189 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 40,001 psi | 64% | 3038 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 52,663 psi | 84% | 3258 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,966 psi | 82% | 3192 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,994 psi | 79% | 3225 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 52,504 psi | 84% | 3255 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,712 psi | 65% | 3038 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 88% | 47,776 psi | 77% | 3241 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 47,863 psi | 77% | 3205 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 34,780 psi | 56% | 2917 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,495 psi | 67% | 3107 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 92% | 50,328 psi | 81% | 3314 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,426 psi | 42% | 1906 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,453 psi | 68% | 3071 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 43,758 psi | 70% | 3127 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,378 psi | 63% | 2986 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,038 psi | 80% | 3189 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 49,980 psi | 80% | 3225 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 90% | 51,198 psi | 82% | 3235 fps | 95.8% |
| IMR 4831 | <<locked>> | 90% | 37,695 psi | 60% | 2995 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 44,106 psi | 71% | 3146 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 49,429 psi | 79% | 3202 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 47,050 psi | 75% | 3169 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,123 psi | 76% | 3123 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 42,380 psi | 68% | 3061 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 44,918 psi | 72% | 3107 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 48,530 psi | 78% | 3199 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 46,398 psi | 74% | 3140 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 46,862 psi | 75% | 3150 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,409 psi | 68% | 3094 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 40,814 psi | 65% | 3091 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 42,424 psi | 68% | 3110 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 45,687 psi | 73% | 3205 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 49,632 psi | 80% | 3202 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,400 psi | 79% | 3232 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,905 psi | 43% | 1952 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 46,949 psi | 75% | 3153 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,687 psi | 73% | 3232 fps | 97.9% |
| ReloadSwiss RS 60 | 68 gr | 80% | 37,101 psi | 59% | 3064 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 40,799 psi | 65% | 3110 fps | 95.6% |
| ReloadSwiss RS 70 | 77.7 gr | 90% | 43,410 psi | 70% | 3192 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 50,415 psi | 81% | 3196 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,135 psi | 71% | 3081 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 37,608 psi | 60% | 2972 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 52,663 psi | 84% | 3258 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,918 psi | 72% | 3107 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,050 psi | 75% | 3169 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,380 psi | 68% | 3061 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 48,530 psi | 78% | 3199 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,609 psi | 62% | 3022 fps | 96.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,225 psi | 77% | 3179 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,919 psi | 74% | 3150 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,500 psi | 76% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,755 psi | 64% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 47,543 psi | 76% | 3107 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 47,210 psi | 76% | 3087 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,906 psi | 77% | 3173 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 38,305 psi | 61% | 2979 fps | 97.1% |
| Somchem S365 | <<locked>> | 82% | 29,965 psi | 48% | 2831 fps | 95.1% |
| Unknown powder | <<locked>> | 86% | 41,510 psi | 67% | 3097 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 52,417 psi | 84% | 3153 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,744 psi | 72% | 3028 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,772 psi | 70% | 3064 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,845 psi | 70% | 3061 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,721 psi | 52% | 2808 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 84% | 38,986 psi | 63% | 3005 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 52,272 psi | 84% | 3268 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 43,453 psi | 70% | 3077 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 39,566 psi | 63% | 3051 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 92% | 36,013 psi | 58% | 3009 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,489 psi | 52% | 2808 fps | 95.1% |
| Winchester 760 | <<locked>> | 88% | 47,776 psi | 77% | 3241 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 33,489 psi | 54% | 3012 fps | 95.7% |
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 110 powders for .300 Win. Mag. loaded with the .308 | 125gr | Sierra Pro-Hunter. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,438 fps; across all powders the maximum-charge window runs from 2,129 fps to 3,438 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 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. 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. ReloadSwiss RS 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 Win. Mag. with the .308 | 125gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.