Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 136gr | Peregrine Plainsmaster (VLR-4) bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Ramshot Hunter.
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.
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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% | 57,043 psi | 89% | 3156 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,463 psi | 88% | 3179 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,434 psi | 87% | 3189 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,341 psi | 76% | 3133 fps | 97.4% |
| Accurate 4064 | <<locked>> | 88% | 56,724 psi | 89% | 3235 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,172 psi | 85% | 3274 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 56,608 psi | 89% | 3274 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,462 psi | 85% | 3219 fps | 99.7% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,898 psi | 88% | 3314 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,448 psi | 87% | 3219 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,985 psi | 89% | 3192 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 57,363 psi | 90% | 3409 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,781 psi | 86% | 3241 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,230 psi | 87% | 3264 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,317 psi | 87% | 3346 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,855 psi | 89% | 3379 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3297 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,571 psi | 71% | 3163 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,402 psi | 82% | 3366 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,956 psi | 89% | 3287 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 55,521 psi | 87% | 3255 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 55,274 psi | 87% | 3225 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,695 psi | 89% | 3196 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,317 psi | 87% | 3241 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,304 psi | 88% | 3271 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 56,884 psi | 89% | 3333 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 92% | 57,029 psi | 89% | 3294 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 57,276 psi | 90% | 3284 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,492 psi | 87% | 3264 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 57,551 psi | 90% | 3320 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 53,563 psi | 84% | 3301 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 56% | 2067 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,969 psi | 86% | 3228 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,085 psi | 85% | 3212 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,377 psi | 90% | 3258 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,971 psi | 89% | 3235 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 56,246 psi | 88% | 3258 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,203 psi | 90% | 3264 fps | 98.1% |
| IMR 4831 | <<locked>> | 96% | 54,708 psi | 86% | 3268 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 56,695 psi | 89% | 3301 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,448 psi | 87% | 3219 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,840 psi | 89% | 3241 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,637 psi | 87% | 3192 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 57,406 psi | 90% | 3251 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,913 psi | 89% | 3255 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 54,491 psi | 85% | 3235 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 55,143 psi | 86% | 3209 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,999 psi | 88% | 3212 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,491 psi | 85% | 3251 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 57,232 psi | 90% | 3314 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 51,576 psi | 81% | 3314 fps | 97.2% |
| Norma URP | <<locked>> | 96% | 56,884 psi | 89% | 3323 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 55,390 psi | 87% | 3274 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 55,695 psi | 87% | 3314 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 55,767 psi | 87% | 3232 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,666 psi | 87% | 3255 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 57% | 2113 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,565 psi | 89% | 3255 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,101 psi | 88% | 3340 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,231 psi | 88% | 3376 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,215 psi | 85% | 3294 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,130 psi | 90% | 3392 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 55,782 psi | 87% | 3192 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,738 psi | 87% | 3209 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,608 psi | 87% | 3251 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,867 psi | 84% | 3274 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 92% | 55,274 psi | 87% | 3225 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,913 psi | 89% | 3255 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,840 psi | 89% | 3241 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 57,406 psi | 90% | 3251 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,491 psi | 85% | 3235 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 57,624 psi | 90% | 3317 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,273 psi | 85% | 3209 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,274 psi | 87% | 3238 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,217 psi | 88% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,174 psi | 90% | 3143 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,145 psi | 90% | 3202 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,374 psi | 84% | 3271 fps | 96% |
| Somchem S335 | <<locked>> | 84% | 55,869 psi | 88% | 3140 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,027 psi | 85% | 3199 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 55,709 psi | 87% | 3248 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 55,811 psi | 87% | 3327 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3255 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 56,710 psi | 89% | 3127 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,941 psi | 88% | 3173 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,652 psi | 89% | 3189 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,261 psi | 90% | 3222 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,535 psi | 87% | 3261 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 55,869 psi | 88% | 3215 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,868 psi | 86% | 3179 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,621 psi | 86% | 3261 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 3248 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,651 psi | 87% | 3228 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,391 psi | 88% | 3268 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,159 psi | 90% | 3337 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,002 psi | 64% | 3186 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,361 psi | 87% | 3245 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% | 53,505 psi | 84% | 3104 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,224 psi | 72% | 3015 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 48,341 psi | 76% | 3054 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 41,887 psi | 66% | 2999 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 43,758 psi | 69% | 3009 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 35,186 psi | 55% | 2867 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 49,734 psi | 78% | 3150 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 42,264 psi | 66% | 2976 fps | 98% |
| ADI AR 2209 | <<locked>> | 98% | 52,359 psi | 82% | 3248 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,909 psi | 81% | 3159 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,040 psi | 83% | 3136 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,122 psi | 72% | 3192 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,192 psi | 66% | 2999 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,281 psi | 71% | 3074 fps | 98.7% |
| Alliant Reloder-16 | 66.1 gr | 82% | 34,911 psi | 55% | 2884 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,796 psi | 58% | 2963 fps | 97.7% |
| Alliant Reloder-19 | <<locked>> | 98% | 51,430 psi | 81% | 3232 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 32,677 psi | 51% | 2838 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 38,682 psi | 61% | 3058 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,501 psi | 78% | 3153 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 42,119 psi | 66% | 3002 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 45,701 psi | 72% | 3041 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,330 psi | 84% | 3143 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,488 psi | 81% | 3179 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,786 psi | 67% | 3009 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 46,296 psi | 73% | 3133 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 88% | 49,879 psi | 78% | 3159 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 50,270 psi | 79% | 3163 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 32,227 psi | 51% | 2772 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,891 psi | 73% | 3130 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 46,050 psi | 72% | 3146 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 42% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,225 psi | 76% | 3107 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 50,546 psi | 79% | 3153 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,411 psi | 70% | 3018 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,891 psi | 73% | 3045 fps | 96% |
| IMR 4350 | <<locked>> | 90% | 46,427 psi | 73% | 3071 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,469 psi | 70% | 3015 fps | 95.1% |
| IMR 4831 | <<locked>> | 84% | 36,506 psi | 57% | 2887 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,441 psi | 73% | 3107 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 51,909 psi | 81% | 3159 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,487 psi | 78% | 3120 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,139 psi | 77% | 3077 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 44,309 psi | 69% | 3015 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 38,841 psi | 61% | 2887 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 44,918 psi | 70% | 3045 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 48,544 psi | 76% | 3094 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 49,081 psi | 77% | 3097 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,628 psi | 70% | 3058 fps | 99% |
| Norma 204 | <<locked>> | 94% | 53,388 psi | 84% | 3245 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 44,541 psi | 70% | 3163 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 35,317 psi | 55% | 2867 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 44,788 psi | 70% | 3074 fps | 98.9% |
| Ramshot Hunter | 75.2 gr | 88% | 42,366 psi | 66% | 3048 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 52,083 psi | 82% | 3169 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,895 psi | 81% | 3189 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,905 psi | 42% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,221 psi | 68% | 2992 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,718 psi | 76% | 3202 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,189 psi | 61% | 3038 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 37,666 psi | 59% | 2949 fps | 95.7% |
| ReloadSwiss RS 70 | 75.8 gr | 86% | 39,929 psi | 63% | 3031 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 52,359 psi | 82% | 3136 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,050 psi | 72% | 3035 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 39,610 psi | 62% | 2940 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 98% | 50,386 psi | 79% | 3212 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 45,701 psi | 72% | 3041 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,841 psi | 61% | 2887 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,487 psi | 78% | 3120 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,309 psi | 69% | 3015 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 44,918 psi | 70% | 3045 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,959 psi | 64% | 2999 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,531 psi | 79% | 3140 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,428 psi | 76% | 3114 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,588 psi | 78% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,611 psi | 65% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,598 psi | 68% | 2949 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 49,922 psi | 78% | 3205 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,356 psi | 77% | 3035 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,328 psi | 79% | 3133 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 40,263 psi | 63% | 2946 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 29,414 psi | 46% | 2740 fps | 96.2% |
| Somchem S385 | <<locked>> | 96% | 47,703 psi | 75% | 3120 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 50,111 psi | 79% | 3025 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,035 psi | 72% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,644 psi | 73% | 3025 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,406 psi | 60% | 2871 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 36,912 psi | 58% | 2877 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 52,170 psi | 82% | 3156 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,933 psi | 70% | 3005 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 36,260 psi | 57% | 2871 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 33,518 psi | 53% | 2858 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,968 psi | 53% | 2782 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 52,692 psi | 83% | 3205 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 46,499 psi | 73% | 3136 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,937 psi | 48% | 2867 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,153 psi | 75% | 3117 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 97 powders for .300 Weath. Mag. loaded with the .308 | 136gr | Peregrine Plainsmaster (VLR-4). Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,409 fps; across all powders the maximum-charge window runs from 2,067 fps to 3,409 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 136.0 gr projectile in 0.308" calls for a 1:12.5 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-16, ReloadSwiss RS 70, Ramshot Hunter rank at the top here: for .300 Weath. Mag. with the .308 | 136gr | Peregrine Plainsmaster (VLR-4) 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.