Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 125gr | Hornady SST bullet and 92 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-16 and ReloadSwiss RS 70.
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% | 56,695 psi | 89% | 3271 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,579 psi | 89% | 3297 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,027 psi | 86% | 3284 fps | 96.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,008 psi | 75% | 3225 fps | 96.6% |
| Accurate 4064 | <<locked>> | 88% | 56,855 psi | 89% | 3350 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 57,653 psi | 90% | 3445 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 56,260 psi | 88% | 3383 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 90% | 57,348 psi | 90% | 3379 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,955 psi | 86% | 3327 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,289 psi | 88% | 3304 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,739 psi | 89% | 3514 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,491 psi | 85% | 3350 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,795 psi | 86% | 3369 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,636 psi | 86% | 3445 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,985 psi | 88% | 3481 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,049 psi | 71% | 3255 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,793 psi | 81% | 3458 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,376 psi | 88% | 3392 fps | 99.4% |
| Bofors RP3 | <<locked>> | 88% | 55,274 psi | 87% | 3366 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,868 psi | 86% | 3323 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,246 psi | 88% | 3307 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,824 psi | 86% | 3353 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,883 psi | 88% | 3376 fps | 99% |
| Hodgdon H414 | <<locked>> | 94% | 56,362 psi | 88% | 3432 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 92% | 56,217 psi | 88% | 3389 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 84% | 56,884 psi | 89% | 3392 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,839 psi | 86% | 3363 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,927 psi | 89% | 3425 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 57,159 psi | 90% | 3471 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 56% | 2159 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,534 psi | 85% | 3337 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 57,232 psi | 90% | 3383 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,884 psi | 89% | 3366 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,449 psi | 88% | 3337 fps | 97.4% |
| IMR 4350 | <<locked>> | 96% | 55,854 psi | 88% | 3356 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,855 psi | 89% | 3366 fps | 97.4% |
| IMR 4831 | <<locked>> | 96% | 54,360 psi | 85% | 3369 fps | 99.2% |
| IMR 4895 | <<locked>> | 86% | 56,231 psi | 88% | 3406 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 82% | 54,955 psi | 86% | 3327 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,637 psi | 89% | 3356 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,172 psi | 86% | 3297 fps | 99.8% |
| Lovex S062 | <<locked>> | 88% | 57,029 psi | 89% | 3360 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,608 psi | 89% | 3360 fps | 98.5% |
| Lovex S070 | <<locked>> | 94% | 54,259 psi | 85% | 3333 fps | 97.2% |
| Norma 201 | <<locked>> | 84% | 54,868 psi | 86% | 3320 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,506 psi | 87% | 3320 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,638 psi | 90% | 3419 fps | 99.9% |
| Norma MRPᴾ | <<locked>> | 100% | 50,908 psi | 80% | 3402 fps | 96.2% |
| Norma URP | <<locked>> | 96% | 56,217 psi | 88% | 3425 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 86% | 54,955 psi | 86% | 3379 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 96% | 55,303 psi | 87% | 3415 fps | 98.1% |
| Ramshot TAC | <<locked>> | 82% | 55,187 psi | 86% | 3333 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,288 psi | 87% | 3360 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 57% | 2205 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,028 psi | 88% | 3353 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,448 psi | 87% | 3445 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,492 psi | 87% | 3484 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 57,595 psi | 90% | 3465 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,478 psi | 89% | 3491 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 82% | 55,680 psi | 87% | 3307 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,637 psi | 87% | 3323 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,288 psi | 87% | 3360 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 92% | 54,868 psi | 86% | 3323 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,608 psi | 89% | 3360 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,637 psi | 89% | 3356 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 57,029 psi | 89% | 3360 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,259 psi | 85% | 3333 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 57,072 psi | 89% | 3425 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,041 psi | 85% | 3314 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,708 psi | 86% | 3343 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,912 psi | 88% | 3258 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,695 psi | 89% | 3251 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,840 psi | 89% | 3304 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 55,550 psi | 87% | 3248 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,377 psi | 90% | 3366 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 55,259 psi | 87% | 3353 fps | 99.9% |
| Somchem S365 | <<locked>> | 98% | 54,882 psi | 86% | 3428 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,186 psi | 85% | 3346 fps | 96.4% |
| Vihtavuori N133 | <<locked>> | 84% | 56,289 psi | 88% | 3241 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,477 psi | 87% | 3284 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,231 psi | 88% | 3297 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,753 psi | 89% | 3330 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,955 psi | 86% | 3360 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 82% | 55,361 psi | 87% | 3323 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,563 psi | 86% | 3287 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,099 psi | 85% | 3360 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,299 psi | 79% | 3346 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,172 psi | 86% | 3330 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,811 psi | 87% | 3376 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,608 psi | 89% | 3438 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,785 psi | 64% | 3268 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,926 psi | 86% | 3353 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% | 53,301 psi | 84% | 3219 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,383 psi | 73% | 3130 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 51,445 psi | 81% | 3219 fps | 95.5% |
| Accurate 3100 | <<locked>> | 98% | 44,744 psi | 70% | 3159 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 43,874 psi | 69% | 3117 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 37,768 psi | 59% | 3031 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 49,487 psi | 78% | 3255 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 41,974 psi | 66% | 3071 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,532 psi | 81% | 3264 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 52,721 psi | 83% | 3251 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,643 psi | 72% | 3291 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,105 psi | 66% | 3097 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,092 psi | 71% | 3176 fps | 98.1% |
| Alliant Reloder-16 | 69.6 gr | 84% | 37,043 psi | 58% | 3041 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,666 psi | 57% | 3054 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 32,590 psi | 51% | 2920 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 41,350 psi | 65% | 3222 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,255 psi | 77% | 3258 fps | 98.5% |
| Bofors RP3 | <<locked>> | 80% | 42,090 psi | 66% | 3104 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 51,619 psi | 81% | 3261 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,823 psi | 83% | 3248 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,213 psi | 80% | 3287 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,786 psi | 67% | 3107 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 49,240 psi | 77% | 3294 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 90% | 52,765 psi | 83% | 3323 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 50,009 psi | 78% | 3268 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 32,097 psi | 50% | 2858 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,340 psi | 73% | 3228 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 90% | 49,211 psi | 77% | 3314 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 42% | 1932 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,906 psi | 75% | 3212 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 50,082 psi | 78% | 3264 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,092 psi | 69% | 3117 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,441 psi | 73% | 3136 fps | 95% |
| IMR 4350 | <<locked>> | 92% | 49,139 psi | 77% | 3228 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 47,021 psi | 74% | 3173 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 38,856 psi | 61% | 3041 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,224 psi | 72% | 3212 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 51,532 psi | 81% | 3264 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 49,400 psi | 77% | 3232 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,762 psi | 76% | 3179 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 44,135 psi | 69% | 3120 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 41,292 psi | 65% | 3045 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 47,877 psi | 75% | 3209 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 48,356 psi | 76% | 3199 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 48,907 psi | 77% | 3209 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,454 psi | 70% | 3163 fps | 98.4% |
| Norma MRP | <<locked>> | 98% | 47,427 psi | 74% | 3327 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 37,652 psi | 59% | 3028 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 44,440 psi | 70% | 3176 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 45,020 psi | 71% | 3209 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 51,692 psi | 81% | 3268 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,488 psi | 81% | 3291 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,064 psi | 42% | 1982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,948 psi | 72% | 3153 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,167 psi | 75% | 3304 fps | 98.6% |
| ReloadSwiss RS 60 | 71.4 gr | 80% | 38,986 psi | 61% | 3133 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 40,364 psi | 63% | 3117 fps | 95.8% |
| ReloadSwiss RS 70 | 79.8 gr | 88% | 42,670 psi | 67% | 3199 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 52,388 psi | 82% | 3251 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,934 psi | 72% | 3140 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 39,494 psi | 62% | 3035 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 51,619 psi | 81% | 3261 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 41,292 psi | 65% | 3045 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,400 psi | 77% | 3232 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,135 psi | 69% | 3120 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 47,877 psi | 75% | 3209 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,640 psi | 64% | 3091 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,270 psi | 79% | 3241 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,022 psi | 75% | 3215 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,400 psi | 77% | 3146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,437 psi | 65% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 46,586 psi | 73% | 3110 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,139 psi | 77% | 3140 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,125 psi | 79% | 3238 fps | 99.3% |
| Somchem S355 | <<locked>> | 80% | 40,118 psi | 63% | 3041 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 29,515 psi | 46% | 2831 fps | 95.3% |
| Somchem S385 | <<locked>> | 98% | 50,676 psi | 79% | 3281 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 49,806 psi | 78% | 3136 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,861 psi | 72% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,267 psi | 73% | 3127 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,203 psi | 60% | 2966 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 39,291 psi | 62% | 3035 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 51,793 psi | 81% | 3261 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 44,875 psi | 70% | 3110 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 38,711 psi | 61% | 3031 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 90% | 35,853 psi | 56% | 3018 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,026 psi | 53% | 2871 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 52,301 psi | 82% | 3314 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 49,429 psi | 77% | 3297 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 33,199 psi | 52% | 3022 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,877 psi | 75% | 3219 fps | 99.4% |
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 92 powders for .300 Weath. Mag. loaded with the .308 | 125gr | Hornady SST. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,514 fps; across all powders the maximum-charge window runs from 2,159 fps to 3,514 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 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 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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-16, ReloadSwiss RS 70 rank at the top here: for .300 Weath. 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.