Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | CutEdge Maximus 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% | 56,492 psi | 89% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,824 psi | 86% | 3058 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 3087 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 56,927 psi | 89% | 3097 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,505 psi | 85% | 3150 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 56,420 psi | 88% | 3133 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,244 psi | 85% | 3084 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,970 psi | 88% | 3196 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,276 psi | 90% | 3268 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,795 psi | 86% | 3104 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,998 psi | 86% | 3127 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,680 psi | 87% | 3219 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,087 psi | 89% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,332 psi | 87% | 3179 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 3173 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,313 psi | 77% | 3110 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,018 psi | 67% | 3012 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 3323 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,565 psi | 89% | 3150 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 55,709 psi | 87% | 3123 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 3173 fps | 97% |
| Bofors RP7 | <<locked>> | 90% | 55,187 psi | 86% | 3100 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 56,130 psi | 88% | 3136 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 57,145 psi | 90% | 3209 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 56,884 psi | 89% | 3166 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 82% | 57,058 psi | 89% | 3143 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,782 psi | 87% | 3136 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,566 psi | 90% | 3182 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,606 psi | 84% | 3179 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 56% | 1975 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,665 psi | 86% | 3091 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,653 psi | 90% | 3120 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,116 psi | 90% | 3123 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,376 psi | 88% | 3100 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 56,405 psi | 88% | 3136 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,029 psi | 89% | 3136 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 55,216 psi | 87% | 3143 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 56,463 psi | 88% | 3159 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,695 psi | 89% | 3104 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,317 psi | 87% | 3058 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,261 psi | 90% | 3114 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,913 psi | 89% | 3127 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 54,694 psi | 86% | 3110 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,207 psi | 68% | 2913 fps | 97.2% |
| Norma 201 | <<locked>> | 82% | 54,839 psi | 86% | 3071 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,753 psi | 87% | 3071 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,302 psi | 85% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,348 psi | 90% | 3192 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 55,956 psi | 88% | 3271 fps | 98.8% |
| Norma URP | <<locked>> | 94% | 57,072 psi | 89% | 3192 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 55,245 psi | 87% | 3140 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 56,086 psi | 88% | 3196 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,753 psi | 58% | 2021 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,115 psi | 88% | 3120 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,188 psi | 88% | 3205 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,594 psi | 89% | 3241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,549 psi | 85% | 3173 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,305 psi | 90% | 3268 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,651 psi | 87% | 3074 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,579 psi | 87% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,711 psi | 90% | 3166 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 54,273 psi | 85% | 3163 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 90% | 55,187 psi | 86% | 3100 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,913 psi | 89% | 3127 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,695 psi | 89% | 3104 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,261 psi | 90% | 3114 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,694 psi | 86% | 3110 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,696 psi | 90% | 3186 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,940 psi | 86% | 3100 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,811 psi | 87% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,942 psi | 89% | 3005 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,840 psi | 89% | 3077 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,795 psi | 84% | 3156 fps | 97.2% |
| Somchem S335 | <<locked>> | 82% | 55,463 psi | 87% | 2995 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,522 psi | 90% | 3123 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,796 psi | 87% | 3117 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,492 psi | 89% | 3199 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,926 psi | 86% | 3136 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 82% | 56,376 psi | 88% | 2986 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,999 psi | 88% | 3031 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,449 psi | 88% | 3048 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,246 psi | 90% | 3091 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,622 psi | 87% | 3133 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,792 psi | 80% | 3048 fps | 97% |
| Vihtavuori N540 | <<locked>> | 84% | 54,549 psi | 85% | 3038 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,824 psi | 86% | 3136 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3196 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,651 psi | 87% | 3100 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,363 psi | 90% | 3212 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,585 psi | 70% | 3156 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,158 psi | 86% | 3110 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3133 fps | 97.3% |
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% | 49,472 psi | 78% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,979 psi | 75% | 2930 fps | 96.5% |
| Accurate 3100 | <<locked>> | 90% | 36,825 psi | 58% | 2769 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 46,920 psi | 74% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,476 psi | 56% | 2759 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 80% | 52,750 psi | 83% | 3074 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,860 psi | 70% | 2910 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 49,081 psi | 77% | 3068 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,530 psi | 78% | 3136 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,223 psi | 71% | 2936 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,254 psi | 76% | 3009 fps | 99.6% |
| Alliant Reloder-16 | 64.1 gr | 80% | 34,983 psi | 55% | 2779 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,827 psi | 62% | 2923 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,457 psi | 76% | 3054 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,716 psi | 72% | 3041 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,877 psi | 45% | 2615 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,666 psi | 59% | 2877 fps | 96% |
| Alliant Reloder-26 | 76.1 gr | 86% | 33,649 psi | 53% | 2808 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,953 psi | 83% | 3091 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 45,368 psi | 71% | 2943 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 45,716 psi | 72% | 3041 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 42,569 psi | 67% | 2854 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 45,876 psi | 72% | 2953 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 40,625 psi | 64% | 2887 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 46,731 psi | 73% | 2979 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 53,374 psi | 84% | 3084 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,460 psi | 51% | 2667 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,227 psi | 79% | 3064 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,873 psi | 67% | 2966 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 42% | 1768 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,126 psi | 80% | 3031 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,954 psi | 85% | 3064 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,123 psi | 74% | 2949 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,574 psi | 78% | 2979 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 43,526 psi | 68% | 2894 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,611 psi | 65% | 2838 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 34,301 psi | 54% | 2717 fps | 96.1% |
| IMR 4895 | <<locked>> | 80% | 49,516 psi | 78% | 3041 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 53,127 psi | 83% | 3048 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,996 psi | 81% | 2999 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,326 psi | 74% | 2946 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,827 psi | 61% | 2776 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 39,668 psi | 62% | 2812 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 37,782 psi | 59% | 2795 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 51,445 psi | 81% | 3015 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,330 psi | 82% | 3018 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,587 psi | 75% | 2992 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 46,543 psi | 73% | 2992 fps | 95% |
| Norma MRP | <<locked>> | 92% | 41,887 psi | 66% | 2989 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,592 psi | 56% | 2762 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 48,037 psi | 75% | 3015 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 37,115 psi | 58% | 2808 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 43% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,992 psi | 72% | 2933 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,359 psi | 82% | 3140 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,424 psi | 66% | 2989 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,462 psi | 56% | 2782 fps | 96% |
| ReloadSwiss RS 70 | 70.1 gr | 80% | 34,635 psi | 54% | 2782 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 49,023 psi | 77% | 2963 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,496 psi | 67% | 2881 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 94% | 50,705 psi | 79% | 3041 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 47,442 psi | 74% | 3035 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 82% | 42,569 psi | 67% | 2854 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,827 psi | 61% | 2776 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,127 psi | 83% | 3048 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,326 psi | 74% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,668 psi | 62% | 2812 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,961 psi | 69% | 2940 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,430 psi | 81% | 3041 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,518 psi | 82% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,251 psi | 69% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,640 psi | 64% | 2772 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,021 psi | 74% | 3028 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 52,127 psi | 82% | 2946 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,809 psi | 84% | 3064 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,975 psi | 67% | 2884 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 32,053 psi | 50% | 2710 fps | 98.4% |
| Somchem S385 | <<locked>> | 90% | 42,018 psi | 66% | 2887 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 53,098 psi | 83% | 2940 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,284 psi | 77% | 2933 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,545 psi | 78% | 2943 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,031 psi | 64% | 2812 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,985 psi | 58% | 2766 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 96% | 44,309 psi | 69% | 2923 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,935 psi | 75% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,550 psi | 57% | 2766 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 31,952 psi | 50% | 2703 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,506 psi | 57% | 2743 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 40,625 psi | 64% | 2887 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,325 psi | 43% | 2638 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,401 psi | 81% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,979 psi | 75% | 3002 fps | 95.6% |
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 108 powders for .300 Weath. Mag. loaded with the .308 | 150gr | CutEdge Maximus. Alliant Reloder-26 delivers the highest muzzle velocity at 3,323 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,323 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 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 150.0 gr projectile in 0.308" calls for a 1:12.0 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 | 150gr | CutEdge Maximus they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Hodgdon H1000 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.