Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 140gr | Peregrine VLR-5 bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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.
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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 2495 | <<locked>> | 86% | 57,725 psi | 90% | 3156 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,492 psi | 89% | 3169 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 3120 fps | 97.9% |
| Accurate 4064 | <<locked>> | 86% | 54,404 psi | 85% | 3156 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,535 psi | 87% | 3258 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 57,682 psi | 90% | 3248 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,492 psi | 87% | 3196 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,130 psi | 90% | 3301 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,478 psi | 89% | 3196 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,752 psi | 86% | 3323 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,912 psi | 88% | 3219 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,376 psi | 88% | 3245 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,579 psi | 89% | 3327 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,099 psi | 85% | 3294 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3284 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,746 psi | 73% | 3150 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,756 psi | 64% | 3031 fps | 96.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 3356 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,186 psi | 85% | 3202 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 56,739 psi | 89% | 3235 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 56,347 psi | 88% | 3209 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,653 psi | 90% | 3173 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,463 psi | 88% | 3222 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,479 psi | 90% | 3255 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 54,360 psi | 85% | 3251 fps | 98% |
| Hodgdon H4350 | <<locked>> | 90% | 54,462 psi | 85% | 3212 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 54,839 psi | 86% | 3202 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,826 psi | 89% | 3245 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,969 psi | 86% | 3235 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,853 psi | 86% | 3291 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 56% | 2041 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,999 psi | 88% | 3205 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,230 psi | 87% | 3189 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,882 psi | 86% | 3179 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,273 psi | 85% | 3153 fps | 97.9% |
| IMR 4350 | <<locked>> | 96% | 57,435 psi | 90% | 3241 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,810 psi | 86% | 3186 fps | 97.9% |
| IMR 4831 | <<locked>> | 96% | 55,999 psi | 88% | 3251 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 54,128 psi | 85% | 3215 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 56,478 psi | 89% | 3196 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,201 psi | 85% | 3163 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,579 psi | 89% | 3169 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,737 psi | 86% | 3169 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,534 psi | 85% | 3179 fps | 98.9% |
| Lovex S070 | <<locked>> | 94% | 55,912 psi | 88% | 3222 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 56,188 psi | 88% | 3189 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,072 psi | 89% | 3189 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,608 psi | 87% | 3228 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,607 psi | 86% | 3232 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 52,939 psi | 83% | 3304 fps | 97.7% |
| Norma URP | <<locked>> | 94% | 54,505 psi | 85% | 3245 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 56,594 psi | 89% | 3255 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 57,058 psi | 89% | 3301 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 56,782 psi | 89% | 3215 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,753 psi | 89% | 3232 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,376 psi | 57% | 2083 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,682 psi | 90% | 3235 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,406 psi | 90% | 3320 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,609 psi | 90% | 3356 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,593 psi | 87% | 3281 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,534 psi | 85% | 3310 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 56,782 psi | 89% | 3166 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,797 psi | 89% | 3189 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,840 psi | 89% | 3228 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 3264 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 92% | 56,347 psi | 88% | 3209 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,534 psi | 85% | 3179 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,201 psi | 85% | 3163 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,737 psi | 86% | 3169 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,912 psi | 88% | 3222 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,056 psi | 86% | 3238 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,405 psi | 87% | 3189 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,347 psi | 88% | 3215 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,246 psi | 90% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,824 psi | 86% | 3068 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,447 psi | 85% | 3123 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3258 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 56,855 psi | 89% | 3114 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,114 psi | 86% | 3179 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,855 psi | 89% | 3228 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 57,290 psi | 90% | 3307 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 3241 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 84% | 57,711 psi | 90% | 3100 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,072 psi | 89% | 3146 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,740 psi | 90% | 3163 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,839 psi | 86% | 3146 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,782 psi | 89% | 3245 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 56,927 psi | 89% | 3192 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,927 psi | 88% | 3153 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,840 psi | 88% | 3241 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 3232 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,884 psi | 89% | 3209 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,566 psi | 90% | 3245 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,563 psi | 86% | 3255 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,105 psi | 66% | 3182 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,492 psi | 89% | 3222 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3169 fps | 96% |
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 2495 | <<locked>> | 80% | 47,268 psi | 74% | 2992 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,064 psi | 72% | 2976 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 39,987 psi | 63% | 2923 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,759 psi | 70% | 2992 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 36,143 psi | 57% | 2858 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 50,705 psi | 79% | 3130 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 43,105 psi | 68% | 2959 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 96% | 49,922 psi | 78% | 3166 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,881 psi | 83% | 3136 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,181 psi | 74% | 3179 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,105 psi | 68% | 2979 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,238 psi | 72% | 3058 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 82% | 35,679 psi | 56% | 2877 fps | 96% |
| Alliant Reloder-17 | 69.5 gr | 80% | 37,855 psi | 59% | 2956 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,342 psi | 77% | 3156 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 31,386 psi | 49% | 2766 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,247 psi | 60% | 2966 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,854 psi | 58% | 2976 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,720 psi | 79% | 3140 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 43,091 psi | 68% | 2986 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 46,601 psi | 73% | 3025 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,230 psi | 85% | 3117 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,576 psi | 82% | 3159 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,874 psi | 69% | 2995 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 44,222 psi | 69% | 3048 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 47,819 psi | 75% | 3084 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 51,256 psi | 80% | 3143 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,835 psi | 48% | 2700 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,950 psi | 75% | 3114 fps | 99.9% |
| Hodgdon Superformance | 78.9 gr | 86% | 43,845 psi | 69% | 3064 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,672 psi | 42% | 1824 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,139 psi | 77% | 3087 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 51,634 psi | 81% | 3130 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,295 psi | 71% | 2999 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,747 psi | 75% | 3028 fps | 96.5% |
| IMR 4350 | <<locked>> | 88% | 44,338 psi | 69% | 2992 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,324 psi | 71% | 2999 fps | 95.8% |
| IMR 4831 | <<locked>> | 82% | 34,824 psi | 55% | 2808 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 47,413 psi | 74% | 3091 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 52,881 psi | 83% | 3136 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,604 psi | 79% | 3100 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,995 psi | 78% | 3054 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 45,208 psi | 71% | 2999 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 39,653 psi | 62% | 2874 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 43,076 psi | 68% | 2969 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 49,472 psi | 78% | 3074 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,053 psi | 78% | 3074 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,571 psi | 71% | 3041 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 50,923 psi | 80% | 3163 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 45,701 psi | 72% | 3156 fps | 95.9% |
| Norma URP | <<locked>> | 82% | 36,201 psi | 57% | 2861 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 45,803 psi | 72% | 3061 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 40,524 psi | 64% | 2972 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 53,055 psi | 83% | 3146 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,939 psi | 83% | 3166 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,021 psi | 42% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,092 psi | 69% | 2979 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,850 psi | 78% | 3186 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,292 psi | 63% | 3031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,027 psi | 56% | 2874 fps | 95.4% |
| ReloadSwiss RS 70 | 74.1 gr | 84% | 38,145 psi | 60% | 2953 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 53,316 psi | 84% | 3110 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,949 psi | 74% | 3015 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 40,524 psi | 64% | 2927 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 96% | 48,298 psi | 76% | 3136 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 46,601 psi | 73% | 3025 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,653 psi | 62% | 2874 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,604 psi | 79% | 3100 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,208 psi | 71% | 2999 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 43,076 psi | 68% | 2969 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,945 psi | 66% | 2986 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,561 psi | 81% | 3123 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,385 psi | 77% | 3097 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,473 psi | 79% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,409 psi | 66% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,483 psi | 70% | 2936 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,155 psi | 80% | 3192 fps | 95.9% |
| Somchem S335 | <<locked>> | 80% | 50,285 psi | 79% | 3012 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,561 psi | 81% | 3117 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 41,147 psi | 64% | 2930 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 30,342 psi | 48% | 2740 fps | 97.1% |
| Somchem S385 | <<locked>> | 94% | 45,571 psi | 71% | 3045 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,010 psi | 80% | 3002 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,021 psi | 74% | 2989 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,572 psi | 75% | 3002 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,247 psi | 62% | 2854 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 35,186 psi | 55% | 2799 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 53,171 psi | 83% | 3130 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,021 psi | 72% | 2989 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 37,130 psi | 58% | 2861 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 34,505 psi | 54% | 2851 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,853 psi | 55% | 2776 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 53,795 psi | 84% | 3186 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,411 psi | 70% | 3054 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,646 psi | 46% | 2792 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,211 psi | 77% | 3100 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 49,052 psi | 77% | 3100 fps | 95% |
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 114 powders for .300 Weath. Mag. loaded with the .308 | 140gr | Peregrine VLR-5. Alliant Reloder-26 delivers the highest muzzle velocity at 3,356 fps; across all powders the maximum-charge window runs from 2,041 fps to 3,356 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 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 140.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 140gr | Peregrine VLR-5 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, 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.