Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 140gr | Lehigh Defense Controlled Chaos bullet and 92 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 Alliant Reloder-26.
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 2495 | <<locked>> | 84% | 57,058 psi | 89% | 3140 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,839 psi | 86% | 3140 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3169 fps | 98.5% |
| Accurate 4064 | <<locked>> | 86% | 57,261 psi | 90% | 3196 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,592 psi | 86% | 3238 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 56,173 psi | 88% | 3222 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,450 psi | 90% | 3225 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,796 psi | 87% | 3278 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,884 psi | 89% | 3360 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,679 psi | 86% | 3196 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,897 psi | 86% | 3219 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,259 psi | 87% | 3304 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,753 psi | 89% | 3333 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,926 psi | 86% | 3258 fps | 96.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3251 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,240 psi | 77% | 3196 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,844 psi | 67% | 3081 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 3406 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,405 psi | 88% | 3238 fps | 99.8% |
| Bofors RP3 | <<locked>> | 86% | 55,622 psi | 87% | 3215 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3251 fps | 96.2% |
| Bofors RP7 | <<locked>> | 90% | 55,143 psi | 86% | 3186 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 86% | 56,130 psi | 88% | 3228 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 56,869 psi | 89% | 3294 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 90% | 56,565 psi | 89% | 3251 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 56,840 psi | 89% | 3235 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,564 psi | 87% | 3222 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,377 psi | 90% | 3274 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,551 psi | 90% | 3333 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 57% | 2047 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,404 psi | 85% | 3179 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,479 psi | 90% | 3215 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,000 psi | 89% | 3212 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,159 psi | 88% | 3186 fps | 98.3% |
| IMR 4350 | <<locked>> | 94% | 55,999 psi | 88% | 3219 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,826 psi | 89% | 3219 fps | 98.3% |
| IMR 4831 | <<locked>> | 94% | 54,955 psi | 86% | 3228 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 56,362 psi | 88% | 3251 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,681 psi | 89% | 3196 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,940 psi | 86% | 3140 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,029 psi | 89% | 3205 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,869 psi | 89% | 3215 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 54,607 psi | 86% | 3199 fps | 98.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,439 psi | 68% | 2995 fps | 96.6% |
| Norma 201 | <<locked>> | 82% | 54,897 psi | 86% | 3166 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,622 psi | 87% | 3163 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,201 psi | 85% | 3202 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,956 psi | 89% | 3274 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 55,666 psi | 87% | 3353 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 56,884 psi | 89% | 3284 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 54,984 psi | 86% | 3228 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,680 psi | 87% | 3274 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,869 psi | 58% | 2096 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,028 psi | 88% | 3205 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,883 psi | 88% | 3294 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,101 psi | 88% | 3330 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,534 psi | 85% | 3261 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,927 psi | 89% | 3353 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 55,695 psi | 87% | 3169 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,695 psi | 87% | 3212 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,334 psi | 90% | 3245 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 98% | 54,157 psi | 85% | 3245 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 90% | 55,143 psi | 86% | 3186 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,869 psi | 89% | 3215 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,681 psi | 89% | 3196 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,029 psi | 89% | 3205 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,607 psi | 86% | 3199 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,363 psi | 90% | 3271 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,795 psi | 86% | 3189 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,796 psi | 87% | 3097 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,608 psi | 89% | 3094 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,666 psi | 89% | 3163 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,493 psi | 90% | 3304 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 55,434 psi | 87% | 3091 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,377 psi | 90% | 3212 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,651 psi | 87% | 3205 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,115 psi | 88% | 3287 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,853 psi | 86% | 3219 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 82% | 56,304 psi | 88% | 3077 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,898 psi | 88% | 3127 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,173 psi | 88% | 3140 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,956 psi | 89% | 3179 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,506 psi | 87% | 3222 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 3123 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 84% | 54,462 psi | 85% | 3130 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,534 psi | 85% | 3219 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 3281 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,405 psi | 87% | 3186 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,087 psi | 89% | 3297 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,425 psi | 70% | 3235 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,955 psi | 86% | 3199 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3209 fps | 96.6% |
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% | 50,053 psi | 78% | 3031 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,022 psi | 75% | 3015 fps | 95.9% |
| Accurate 3100 | <<locked>> | 92% | 39,798 psi | 62% | 2913 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 47,355 psi | 74% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,766 psi | 56% | 2844 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 52,663 psi | 83% | 3163 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 44,860 psi | 70% | 2995 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 94% | 48,762 psi | 76% | 3140 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,240 psi | 77% | 3219 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,107 psi | 71% | 3018 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,225 psi | 76% | 3094 fps | 99.4% |
| Alliant Reloder-16 | 65.7 gr | 80% | 35,128 psi | 55% | 2858 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,697 psi | 62% | 2999 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,153 psi | 75% | 3130 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,704 psi | 76% | 3186 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 86% | 31,111 psi | 49% | 2753 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,768 psi | 59% | 2949 fps | 95.2% |
| Alliant Reloder-26 | 79.7 gr | 88% | 36,318 psi | 57% | 2959 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,736 psi | 83% | 3176 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 45,498 psi | 71% | 3031 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 48,704 psi | 76% | 3186 fps | 95.3% |
| Bofors RP7 | <<locked>> | 84% | 45,585 psi | 71% | 3002 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,905 psi | 72% | 3038 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 43,482 psi | 68% | 3031 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 49,719 psi | 78% | 3120 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 53,287 psi | 84% | 3173 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,518 psi | 51% | 2743 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,937 psi | 78% | 3150 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 46,050 psi | 72% | 3114 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 42% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,981 psi | 80% | 3120 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 53,925 psi | 85% | 3163 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,166 psi | 74% | 3035 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,443 psi | 77% | 3061 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 46,369 psi | 73% | 3035 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,222 psi | 69% | 2972 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 34,519 psi | 54% | 2795 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 49,472 psi | 78% | 3130 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 53,040 psi | 83% | 3136 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,750 psi | 81% | 3087 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 47,311 psi | 74% | 3035 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 39,088 psi | 61% | 2858 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 42,308 psi | 66% | 2949 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 40,625 psi | 64% | 2933 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 51,634 psi | 81% | 3107 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,127 psi | 82% | 3107 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,601 psi | 75% | 3081 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 49,574 psi | 78% | 3136 fps | 95.1% |
| Norma MRP | <<locked>> | 94% | 44,933 psi | 70% | 3136 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 35,723 psi | 56% | 2844 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,892 psi | 75% | 3097 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 39,740 psi | 62% | 2949 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 43% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,876 psi | 72% | 3012 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,011 psi | 82% | 3225 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,206 psi | 66% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,650 psi | 56% | 2861 fps | 95.4% |
| ReloadSwiss RS 70 | 73.6 gr | 82% | 37,289 psi | 58% | 2930 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 49,081 psi | 77% | 3054 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,728 psi | 67% | 2969 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 96% | 53,867 psi | 84% | 3182 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 96% | 50,531 psi | 79% | 3179 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 84% | 45,585 psi | 71% | 3002 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,088 psi | 61% | 2858 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,040 psi | 83% | 3136 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,311 psi | 74% | 3035 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 42,308 psi | 66% | 2949 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,830 psi | 69% | 3022 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,213 psi | 80% | 3127 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,402 psi | 82% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,251 psi | 69% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 43,700 psi | 68% | 2917 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 50,067 psi | 78% | 3169 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 52,214 psi | 82% | 3041 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,635 psi | 84% | 3153 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 43,163 psi | 68% | 2969 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 32,213 psi | 50% | 2792 fps | 97.9% |
| Somchem S385 | <<locked>> | 92% | 44,933 psi | 70% | 3028 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 52,939 psi | 83% | 3028 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,269 psi | 77% | 3025 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,501 psi | 78% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,147 psi | 64% | 2894 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 37,057 psi | 58% | 2844 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 98% | 47,326 psi | 74% | 3061 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,921 psi | 75% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,666 psi | 57% | 2844 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 34,461 psi | 54% | 2844 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,550 psi | 57% | 2818 fps | 98.3% |
| Winchester 760 | <<locked>> | 84% | 43,482 psi | 68% | 3031 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 29,544 psi | 46% | 2782 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,285 psi | 80% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,372 psi | 81% | 3146 fps | 95.8% |
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 107 powders for .300 Weath. Mag. loaded with the .308 | 140gr | Lehigh Defense Controlled Chaos. Alliant Reloder-26 delivers the highest muzzle velocity at 3,406 fps; across all powders the maximum-charge window runs from 2,047 fps to 3,406 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 140gr | Lehigh Defense Controlled Chaos 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.