Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Barnes RRLP bullet and 93 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% | 56,782 psi | 89% | 3031 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,636 psi | 86% | 3038 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3068 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 57,188 psi | 90% | 3091 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,273 psi | 85% | 3136 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 56,159 psi | 88% | 3117 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,290 psi | 90% | 3120 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,434 psi | 87% | 3173 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,782 psi | 89% | 3251 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,665 psi | 86% | 3091 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,810 psi | 86% | 3114 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,129 psi | 86% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,333 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,636 psi | 86% | 3156 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,880 psi | 81% | 3153 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,921 psi | 77% | 3094 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,714 psi | 67% | 2992 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3297 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,202 psi | 88% | 3133 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 55,564 psi | 87% | 3110 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,880 psi | 81% | 3153 fps | 96.6% |
| Bofors RP7 | <<locked>> | 90% | 54,955 psi | 86% | 3084 fps | 98% |
| Hodgdon H380 | <<locked>> | 86% | 55,912 psi | 88% | 3123 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 56,521 psi | 89% | 3189 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 56,391 psi | 88% | 3146 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 56,768 psi | 89% | 3127 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,303 psi | 87% | 3117 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,174 psi | 90% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,116 psi | 90% | 3228 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,201 psi | 57% | 1962 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,360 psi | 85% | 3074 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,435 psi | 90% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,855 psi | 89% | 3104 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,159 psi | 88% | 3081 fps | 98.6% |
| IMR 4350 | <<locked>> | 94% | 55,811 psi | 87% | 3114 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,507 psi | 89% | 3114 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 54,723 psi | 86% | 3123 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 56,275 psi | 88% | 3143 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,652 psi | 89% | 3091 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,940 psi | 86% | 3035 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,913 psi | 89% | 3094 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,608 psi | 89% | 3110 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 54,433 psi | 85% | 3094 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,279 psi | 68% | 2904 fps | 97% |
| Norma 201 | <<locked>> | 82% | 54,955 psi | 86% | 3058 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,506 psi | 87% | 3054 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,696 psi | 90% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,826 psi | 89% | 3173 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 55,201 psi | 87% | 3245 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 56,666 psi | 89% | 3179 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 54,926 psi | 86% | 3123 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,579 psi | 87% | 3173 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 58% | 2008 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,956 psi | 88% | 3104 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,666 psi | 87% | 3182 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,014 psi | 88% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,085 psi | 85% | 3156 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,608 psi | 89% | 3245 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,550 psi | 87% | 3058 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,419 psi | 87% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,159 psi | 90% | 3140 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3205 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 54,955 psi | 86% | 3084 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,608 psi | 89% | 3110 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,652 psi | 89% | 3091 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,913 psi | 89% | 3094 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,433 psi | 85% | 3094 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,145 psi | 90% | 3163 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,595 psi | 90% | 3120 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,520 psi | 85% | 3081 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,637 psi | 87% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,681 psi | 89% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,579 psi | 89% | 3061 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3199 fps | 97.6% |
| Somchem S335 | <<locked>> | 82% | 55,477 psi | 87% | 2986 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,203 psi | 90% | 3107 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,535 psi | 87% | 3100 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,825 psi | 87% | 3179 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,650 psi | 86% | 3120 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 82% | 56,101 psi | 88% | 2969 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,651 psi | 87% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,217 psi | 88% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,826 psi | 89% | 3071 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,230 psi | 87% | 3114 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,285 psi | 79% | 3028 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 84% | 54,491 psi | 85% | 3028 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,375 psi | 85% | 3117 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 3179 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,984 psi | 86% | 3081 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,753 psi | 89% | 3192 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,150 psi | 69% | 3136 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,853 psi | 86% | 3091 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 3114 fps | 97% |
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% | 49,908 psi | 78% | 2930 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,935 psi | 75% | 2917 fps | 96.3% |
| Accurate 3100 | <<locked>> | 92% | 39,537 psi | 62% | 2825 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 47,253 psi | 74% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,766 psi | 56% | 2756 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 80% | 52,692 psi | 83% | 3061 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,715 psi | 70% | 2894 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 48,588 psi | 76% | 3045 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,255 psi | 77% | 3120 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,208 psi | 71% | 2923 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,240 psi | 76% | 2995 fps | 99.6% |
| Alliant Reloder-16 | 62.4 gr | 80% | 35,027 psi | 55% | 2766 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,610 psi | 62% | 2907 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 47,993 psi | 75% | 3035 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,544 psi | 76% | 3087 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 84% | 29,109 psi | 46% | 2612 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,565 psi | 59% | 2864 fps | 95.7% |
| Alliant Reloder-26 | 75.8 gr | 88% | 36,216 psi | 57% | 2874 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,591 psi | 82% | 3071 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 45,382 psi | 71% | 2933 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 48,544 psi | 76% | 3087 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 42,728 psi | 67% | 2844 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 45,818 psi | 72% | 2940 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 82% | 40,437 psi | 63% | 2871 fps | 95% |
| Hodgdon H4350 | <<locked>> | 84% | 46,412 psi | 73% | 2959 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 53,287 psi | 84% | 3071 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,561 psi | 51% | 2657 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,009 psi | 78% | 3048 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,583 psi | 67% | 2946 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 42% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,952 psi | 80% | 3015 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,708 psi | 84% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,021 psi | 74% | 2933 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,327 psi | 77% | 2959 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 43,337 psi | 68% | 2877 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,423 psi | 65% | 2818 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 34,519 psi | 54% | 2710 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 49,472 psi | 78% | 3025 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 53,055 psi | 83% | 3035 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,822 psi | 81% | 2982 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,355 psi | 74% | 2936 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,015 psi | 61% | 2766 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 39,740 psi | 62% | 2799 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 37,869 psi | 59% | 2785 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,503 psi | 81% | 3002 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,243 psi | 82% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,601 psi | 75% | 2982 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 49,574 psi | 78% | 3041 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 41,626 psi | 65% | 2972 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 35,694 psi | 56% | 2753 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,906 psi | 75% | 3002 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 39,668 psi | 62% | 2858 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,456 psi | 43% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,963 psi | 72% | 2920 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,040 psi | 82% | 3123 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,105 psi | 66% | 2972 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,578 psi | 56% | 2772 fps | 95.9% |
| ReloadSwiss RS 70 | 70 gr | 82% | 37,246 psi | 58% | 2841 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 49,066 psi | 77% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,685 psi | 67% | 2871 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 53,577 psi | 84% | 3081 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 94% | 46,978 psi | 74% | 3015 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 42,728 psi | 67% | 2844 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,015 psi | 61% | 2766 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,055 psi | 83% | 3035 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,355 psi | 74% | 2936 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,740 psi | 62% | 2799 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,830 psi | 69% | 2927 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,824 psi | 84% | 3061 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,198 psi | 80% | 3025 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,286 psi | 82% | 2936 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,150 psi | 69% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,727 psi | 64% | 2762 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,543 psi | 73% | 3005 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,127 psi | 82% | 2933 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,505 psi | 84% | 3048 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,062 psi | 67% | 2874 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 32,227 psi | 51% | 2707 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 44,759 psi | 70% | 2933 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,852 psi | 83% | 2923 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,139 psi | 77% | 2917 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,458 psi | 78% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,104 psi | 64% | 2799 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 37,057 psi | 58% | 2756 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 96% | 43,990 psi | 69% | 2904 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 47,863 psi | 75% | 2920 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,622 psi | 57% | 2756 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 32,126 psi | 50% | 2697 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,448 psi | 57% | 2730 fps | 98.6% |
| Winchester 760 | <<locked>> | 82% | 40,596 psi | 64% | 2874 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,630 psi | 43% | 2638 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,242 psi | 80% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,659 psi | 75% | 2982 fps | 95.3% |
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 93 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Barnes RRLP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,962 fps to 3,297 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 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 150.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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 | Barnes RRLP 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.