Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 125gr | Barnes Solid bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Reloder-16.
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% | 56,159 psi | 88% | 3261 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,825 psi | 87% | 3284 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,130 psi | 90% | 3356 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,273 psi | 85% | 3264 fps | 96% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,123 psi | 74% | 3205 fps | 96.3% |
| Accurate 4064 | <<locked>> | 88% | 55,898 psi | 88% | 3337 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,811 psi | 89% | 3428 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 84% | 55,593 psi | 87% | 3366 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 56,710 psi | 89% | 3366 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,302 psi | 85% | 3310 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,637 psi | 87% | 3297 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,869 psi | 88% | 3497 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,246 psi | 90% | 3396 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,566 psi | 90% | 3419 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,392 psi | 90% | 3491 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,172 psi | 86% | 3468 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,367 psi | 70% | 3238 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,734 psi | 80% | 3435 fps | 98.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,753 psi | 87% | 3376 fps | 99.3% |
| Bofors RP3 | <<locked>> | 88% | 54,375 psi | 85% | 3346 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,317 psi | 85% | 3310 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,811 psi | 87% | 3297 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,157 psi | 85% | 3337 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,056 psi | 86% | 3356 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 94% | 55,419 psi | 87% | 3412 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 56,188 psi | 88% | 3383 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3406 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,289 psi | 88% | 3415 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,289 psi | 88% | 3455 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,708 psi | 56% | 2152 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,319 psi | 90% | 3383 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,376 psi | 88% | 3369 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,217 psi | 88% | 3350 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,840 psi | 88% | 3320 fps | 97.2% |
| IMR 4350 | <<locked>> | 96% | 54,911 psi | 86% | 3337 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,101 psi | 88% | 3346 fps | 97.1% |
| IMR 4831 | <<locked>> | 98% | 57,101 psi | 89% | 3415 fps | 99.5% |
| IMR 4895 | <<locked>> | 86% | 55,506 psi | 87% | 3392 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 82% | 54,302 psi | 85% | 3310 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,695 psi | 87% | 3340 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,723 psi | 86% | 3284 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 56,101 psi | 88% | 3343 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,898 psi | 88% | 3343 fps | 98.4% |
| Lovex S070 | <<locked>> | 96% | 57,072 psi | 89% | 3383 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 54,157 psi | 85% | 3307 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,795 psi | 86% | 3310 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,753 psi | 89% | 3399 fps | 99.8% |
| Norma URP | <<locked>> | 96% | 55,434 psi | 87% | 3409 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 86% | 54,114 psi | 85% | 3363 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 96% | 54,331 psi | 85% | 3396 fps | 97.8% |
| Ramshot TAC | <<locked>> | 82% | 54,679 psi | 86% | 3320 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,447 psi | 85% | 3343 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,332 psi | 57% | 2201 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,303 psi | 87% | 3333 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,679 psi | 86% | 3428 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,665 psi | 86% | 3468 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,623 psi | 89% | 3445 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,593 psi | 87% | 3471 fps | 99% |
| Rottweil R 901 | <<locked>> | 82% | 55,114 psi | 86% | 3297 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,940 psi | 86% | 3307 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,433 psi | 85% | 3340 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 92% | 54,317 psi | 85% | 3310 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,898 psi | 88% | 3343 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,695 psi | 87% | 3340 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,101 psi | 88% | 3343 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,072 psi | 89% | 3383 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,260 psi | 88% | 3406 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,058 psi | 89% | 3360 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,667 psi | 90% | 3389 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,230 psi | 87% | 3241 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,043 psi | 88% | 3238 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,028 psi | 88% | 3287 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 54,882 psi | 86% | 3238 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,811 psi | 89% | 3353 fps | 99.8% |
| Somchem S355 | <<locked>> | 90% | 54,592 psi | 86% | 3340 fps | 99.9% |
| Somchem S365 | <<locked>> | 98% | 54,012 psi | 85% | 3415 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,272 psi | 83% | 3327 fps | 96.1% |
| Vihtavuori N133 | <<locked>> | 84% | 55,593 psi | 87% | 3228 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,723 psi | 86% | 3271 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,579 psi | 87% | 3287 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,130 psi | 88% | 3317 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,172 psi | 85% | 3343 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 54,665 psi | 86% | 3307 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,334 psi | 90% | 3330 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,971 psi | 89% | 3406 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,443 psi | 77% | 3330 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,317 psi | 85% | 3317 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,129 psi | 86% | 3363 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,622 psi | 87% | 3415 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,074 psi | 63% | 3248 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,128 psi | 85% | 3333 fps | 99.9% |
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% | 52,750 psi | 83% | 3209 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,847 psi | 72% | 3117 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,432 psi | 84% | 3294 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,676 psi | 79% | 3199 fps | 95.2% |
| Accurate 3100 | <<locked>> | 98% | 43,888 psi | 69% | 3140 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,323 psi | 68% | 3107 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 39,914 psi | 63% | 3084 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,805 psi | 76% | 3238 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 41,379 psi | 65% | 3054 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,879 psi | 80% | 3248 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 51,895 psi | 81% | 3238 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,049 psi | 71% | 3271 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,452 psi | 65% | 3084 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,411 psi | 70% | 3159 fps | 97.9% |
| Alliant Reloder-16 | 70.4 gr | 86% | 39,044 psi | 61% | 3094 fps | 95.9% |
| Alliant Reloder-17 | 70.5 gr | 80% | 36,129 psi | 57% | 3038 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 34,229 psi | 54% | 2969 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 94% | 40,625 psi | 64% | 3199 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,472 psi | 76% | 3241 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 41,597 psi | 65% | 3091 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 50,879 psi | 80% | 3245 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,388 psi | 82% | 3235 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,517 psi | 79% | 3271 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,163 psi | 66% | 3094 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 48,472 psi | 76% | 3278 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,284 psi | 77% | 3251 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 33,837 psi | 53% | 2907 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,672 psi | 72% | 3212 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 90% | 48,443 psi | 76% | 3297 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 42% | 1929 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,224 psi | 74% | 3192 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 49,501 psi | 78% | 3251 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,468 psi | 68% | 3097 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,110 psi | 77% | 3192 fps | 95.7% |
| IMR 4350 | <<locked>> | 94% | 51,677 psi | 81% | 3274 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,574 psi | 78% | 3222 fps | 95.7% |
| IMR 4831 | <<locked>> | 86% | 38,290 psi | 60% | 3028 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 45,513 psi | 71% | 3196 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 50,879 psi | 80% | 3248 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 48,718 psi | 76% | 3219 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,298 psi | 76% | 3166 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 43,656 psi | 68% | 3104 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 43,468 psi | 68% | 3094 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 47,166 psi | 74% | 3189 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 47,863 psi | 75% | 3186 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 48,211 psi | 76% | 3192 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,816 psi | 69% | 3146 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 39,755 psi | 62% | 3081 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,845 psi | 69% | 3159 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 44,324 psi | 69% | 3192 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 51,155 psi | 80% | 3255 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,879 psi | 80% | 3278 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,006 psi | 42% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,397 psi | 71% | 3140 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,456 psi | 74% | 3287 fps | 98.4% |
| ReloadSwiss RS 60 | 70.5 gr | 80% | 38,421 psi | 60% | 3117 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 39,639 psi | 62% | 3094 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 42,047 psi | 66% | 3176 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 51,851 psi | 81% | 3241 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,455 psi | 71% | 3127 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 39,015 psi | 61% | 3022 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 50,879 psi | 80% | 3245 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,468 psi | 68% | 3094 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,718 psi | 76% | 3219 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,656 psi | 68% | 3104 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 47,166 psi | 74% | 3189 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,030 psi | 63% | 3074 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,617 psi | 78% | 3225 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,398 psi | 74% | 3199 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,849 psi | 77% | 3133 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,973 psi | 64% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,095 psi | 77% | 3159 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 48,646 psi | 76% | 3130 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,298 psi | 77% | 3219 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 39,668 psi | 62% | 3028 fps | 97.7% |
| Somchem S365 | <<locked>> | 82% | 31,067 psi | 49% | 2884 fps | 96% |
| Somchem S385 | <<locked>> | 98% | 49,835 psi | 78% | 3261 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 49,284 psi | 77% | 3127 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,295 psi | 71% | 3110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,759 psi | 72% | 3114 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,753 psi | 59% | 2953 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 38,711 psi | 61% | 3018 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 51,314 psi | 80% | 3248 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 44,251 psi | 69% | 3097 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 40,799 psi | 64% | 3081 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 92% | 37,710 psi | 59% | 3068 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,475 psi | 52% | 2854 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 51,590 psi | 81% | 3301 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,660 psi | 76% | 3281 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 32,692 psi | 51% | 3002 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,253 psi | 74% | 3205 fps | 99.3% |
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 111 powders for .300 Weath. Mag. loaded with the .308 | 125gr | Barnes Solid. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,497 fps; across all powders the maximum-charge window runs from 2,152 fps to 3,497 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 (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:13.5 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. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Reloder-16 rank at the top here: for .300 Weath. Mag. with the .308 | 125gr | Barnes Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-22, Alliant Reloder-25, Bofors RP15 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.