Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 139gr | RWS Evolution Green bullet and 98 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 Hodgdon H414.
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% | 56,304 psi | 88% | 3110 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,680 psi | 87% | 3133 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,580 psi | 90% | 3209 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,592 psi | 86% | 3136 fps | 97% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,152 psi | 74% | 3077 fps | 97.2% |
| Accurate 4064 | <<locked>> | 88% | 56,057 psi | 88% | 3189 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,942 psi | 89% | 3284 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 55,927 psi | 88% | 3222 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,232 psi | 90% | 3225 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,926 psi | 86% | 3261 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,723 psi | 86% | 3169 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,956 psi | 88% | 3140 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,420 psi | 88% | 3356 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,520 psi | 85% | 3248 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,566 psi | 90% | 3248 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,404 psi | 85% | 3215 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,244 psi | 85% | 3291 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,637 psi | 87% | 3327 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,867 psi | 84% | 3241 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,585 psi | 70% | 3110 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,184 psi | 80% | 3310 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,043 psi | 88% | 3235 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 54,723 psi | 86% | 3209 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,665 psi | 86% | 3176 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,115 psi | 88% | 3150 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,505 psi | 85% | 3196 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,376 psi | 87% | 3219 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 55,970 psi | 88% | 3281 fps | 98% |
| Hodgdon H4350 | <<locked>> | 92% | 56,014 psi | 88% | 3238 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 84% | 56,521 psi | 89% | 3235 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,476 psi | 85% | 3212 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,782 psi | 89% | 3271 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,637 psi | 89% | 3320 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,766 psi | 56% | 2031 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,288 psi | 85% | 3179 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,840 psi | 89% | 3219 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,536 psi | 89% | 3209 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,231 psi | 88% | 3186 fps | 98% |
| IMR 4350 | <<locked>> | 96% | 55,376 psi | 87% | 3205 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,391 psi | 88% | 3212 fps | 97.9% |
| IMR 4831 | <<locked>> | 98% | 57,421 psi | 90% | 3278 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 55,840 psi | 88% | 3248 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,723 psi | 86% | 3169 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,927 psi | 88% | 3192 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,114 psi | 86% | 3146 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 56,492 psi | 89% | 3202 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,086 psi | 88% | 3205 fps | 98.9% |
| Lovex S070 | <<locked>> | 96% | 57,363 psi | 90% | 3245 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 54,346 psi | 85% | 3159 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,216 psi | 87% | 3163 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,217 psi | 90% | 3258 fps | 100% |
| Norma 204 | <<locked>> | 96% | 56,478 psi | 89% | 3264 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 50,270 psi | 79% | 3255 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 55,854 psi | 88% | 3271 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 54,505 psi | 85% | 3225 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 54,911 psi | 86% | 3268 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 54,868 psi | 86% | 3182 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,897 psi | 86% | 3205 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,230 psi | 57% | 2077 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,753 psi | 87% | 3202 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,158 psi | 86% | 3287 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,376 psi | 87% | 3327 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 57,058 psi | 89% | 3307 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,202 psi | 88% | 3343 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 55,056 psi | 86% | 3143 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,998 psi | 86% | 3159 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,592 psi | 86% | 3199 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3222 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 92% | 54,665 psi | 86% | 3176 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,086 psi | 88% | 3205 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,927 psi | 88% | 3192 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,492 psi | 89% | 3202 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,363 psi | 90% | 3245 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,782 psi | 89% | 3268 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,392 psi | 90% | 3222 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,476 psi | 85% | 3189 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,593 psi | 87% | 3097 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,521 psi | 89% | 3097 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,260 psi | 88% | 3153 fps | 98% |
| Somchem S335 | <<locked>> | 84% | 55,129 psi | 86% | 3091 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,087 psi | 89% | 3212 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,723 psi | 86% | 3196 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,520 psi | 85% | 3274 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,621 psi | 84% | 3202 fps | 97% |
| Vihtavuori N133 | <<locked>> | 84% | 56,072 psi | 88% | 3081 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,071 psi | 86% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,782 psi | 87% | 3140 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,347 psi | 88% | 3176 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,491 psi | 85% | 3209 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 55,129 psi | 86% | 3166 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,667 psi | 90% | 3186 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,319 psi | 90% | 3271 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,734 psi | 78% | 3199 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,766 psi | 86% | 3182 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,724 psi | 87% | 3219 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,188 psi | 88% | 3284 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,103 psi | 63% | 3130 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,578 psi | 86% | 3199 fps | 100% |
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% | 52,924 psi | 83% | 3058 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,455 psi | 71% | 2966 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,664 psi | 84% | 3146 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,790 psi | 75% | 3009 fps | 95.4% |
| Accurate 3100 | <<locked>> | 96% | 40,843 psi | 64% | 2946 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 43,033 psi | 67% | 2963 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 37,086 psi | 58% | 2887 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 49,153 psi | 77% | 3100 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 41,669 psi | 65% | 2930 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 98% | 51,358 psi | 80% | 3196 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,285 psi | 80% | 3110 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,417 psi | 82% | 3091 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,498 psi | 71% | 3143 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 50,981 psi | 80% | 3182 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,568 psi | 65% | 2953 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,672 psi | 70% | 3025 fps | 98.6% |
| Alliant Reloder-16 | 64.2 gr | 82% | 34,418 psi | 54% | 2838 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,201 psi | 57% | 2917 fps | 97.6% |
| Alliant Reloder-19 | <<locked>> | 98% | 50,444 psi | 79% | 3176 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,995 psi | 50% | 2789 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 37,840 psi | 59% | 3005 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,921 psi | 77% | 3107 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 41,510 psi | 65% | 2956 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 47,979 psi | 75% | 3051 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,707 psi | 83% | 3094 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,850 psi | 80% | 3133 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,250 psi | 66% | 2963 fps | 97% |
| Hodgdon H414 | 72.6 gr | 88% | 45,643 psi | 72% | 3084 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 88% | 49,211 psi | 77% | 3114 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 49,647 psi | 78% | 3114 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 31,560 psi | 49% | 2723 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,006 psi | 72% | 3081 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 88% | 45,324 psi | 71% | 3100 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 42% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,630 psi | 75% | 3061 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 49,748 psi | 78% | 3104 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,787 psi | 69% | 2969 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,224 psi | 72% | 2995 fps | 95.8% |
| IMR 4350 | <<locked>> | 90% | 45,658 psi | 72% | 3022 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,874 psi | 69% | 2969 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 35,853 psi | 56% | 2838 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 45,818 psi | 72% | 3064 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 51,285 psi | 80% | 3110 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,718 psi | 76% | 3074 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,501 psi | 76% | 3028 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 43,671 psi | 68% | 2969 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 40,756 psi | 64% | 2904 fps | 95.7% |
| Lovex S070 | <<locked>> | 88% | 44,222 psi | 69% | 2999 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 47,892 psi | 75% | 3045 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 48,414 psi | 76% | 3051 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,048 psi | 69% | 3015 fps | 98.9% |
| Norma 204 | <<locked>> | 94% | 52,518 psi | 82% | 3192 fps | 95.4% |
| Norma MRP | <<locked>> | 98% | 46,949 psi | 74% | 3186 fps | 95.9% |
| Norma URP | <<locked>> | 84% | 37,289 psi | 58% | 2890 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 44,164 psi | 69% | 3028 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 41,597 psi | 65% | 3002 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 51,358 psi | 80% | 3120 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,271 psi | 80% | 3140 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 42% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,569 psi | 67% | 2943 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,892 psi | 75% | 3153 fps | 99.1% |
| ReloadSwiss RS 60 | 67.4 gr | 80% | 38,580 psi | 60% | 2992 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,985 psi | 58% | 2907 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 39,262 psi | 62% | 2982 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 51,793 psi | 81% | 3091 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,527 psi | 71% | 2992 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 39,001 psi | 61% | 2890 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 98% | 49,313 psi | 77% | 3156 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 88% | 47,979 psi | 75% | 3051 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,756 psi | 64% | 2904 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,718 psi | 76% | 3074 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,671 psi | 68% | 2969 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 44,222 psi | 69% | 2999 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,321 psi | 63% | 2953 fps | 98.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,908 psi | 78% | 3094 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,732 psi | 75% | 3068 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,052 psi | 77% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,118 psi | 64% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,105 psi | 68% | 2907 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 48,762 psi | 76% | 2989 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,777 psi | 78% | 3087 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 39,653 psi | 62% | 2900 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 28,935 psi | 45% | 2700 fps | 96.1% |
| Somchem S385 | <<locked>> | 96% | 46,862 psi | 73% | 3074 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 49,574 psi | 78% | 2982 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,426 psi | 71% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,021 psi | 72% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,797 psi | 59% | 2828 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 36,245 psi | 57% | 2831 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 51,576 psi | 81% | 3107 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,411 psi | 70% | 2963 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,694 psi | 56% | 2828 fps | 95% |
| Vihtavuori N555 | <<locked>> | 90% | 35,230 psi | 55% | 2877 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,533 psi | 53% | 2743 fps | 97% |
| Winchester 748 | <<locked>> | 80% | 51,953 psi | 81% | 3159 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,643 psi | 72% | 3084 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,327 psi | 48% | 2815 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,529 psi | 74% | 3071 fps | 99.7% |
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 98 powders for .300 Weath. Mag. loaded with the .308 | 139gr | RWS Evolution Green. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,356 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,356 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 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 139.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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, Hodgdon H414 rank at the top here: for .300 Weath. Mag. with the .308 | 139gr | RWS Evolution Green 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.