Load Specifications
Load data in caliber .300 Weath. Mag. with .311 | 155gr | Frontier FBSP bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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>> | 82% | 54,650 psi | 86% | 2953 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,970 psi | 88% | 3018 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 3058 fps | 99.2% |
| Accurate 4064 | <<locked>> | 84% | 55,129 psi | 86% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,782 psi | 87% | 3114 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 57,305 psi | 90% | 3091 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,085 psi | 86% | 3041 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,855 psi | 89% | 3156 fps | 97.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3143 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,259 psi | 85% | 3166 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,883 psi | 88% | 3068 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,072 psi | 88% | 3087 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,536 psi | 89% | 3176 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,143 psi | 85% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,260 psi | 88% | 3143 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,388 psi | 84% | 3140 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,386 psi | 79% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,888 psi | 69% | 2979 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,056 psi | 85% | 3215 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,479 psi | 90% | 3107 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 3054 fps | 96.1% |
| Bofors RP3 | <<locked>> | 86% | 56,884 psi | 89% | 3084 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,388 psi | 84% | 3140 fps | 97.3% |
| Bofors RP7 | <<locked>> | 90% | 56,173 psi | 88% | 3061 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 57,217 psi | 90% | 3100 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,331 psi | 85% | 3107 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 57,725 psi | 90% | 3127 fps | 98.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3130 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,753 psi | 89% | 3091 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,911 psi | 86% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,636 psi | 86% | 3143 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,303 psi | 57% | 1936 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,463 psi | 87% | 3045 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,650 psi | 86% | 3025 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,261 psi | 90% | 3058 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 57,130 psi | 90% | 3094 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,389 psi | 85% | 3035 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 56,347 psi | 88% | 3107 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,508 psi | 90% | 3117 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,289 psi | 88% | 3077 fps | 95.9% |
| Lovex S060 | <<locked>> | 82% | 55,985 psi | 88% | 3009 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,781 psi | 86% | 3018 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,520 psi | 85% | 3035 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 55,651 psi | 87% | 3071 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,585 psi | 70% | 2890 fps | 97.6% |
| Norma 201 | <<locked>> | 82% | 56,072 psi | 88% | 3031 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,884 psi | 89% | 3028 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,376 psi | 87% | 3074 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,302 psi | 85% | 3087 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3228 fps | 99% |
| Norma URP | <<locked>> | 92% | 54,418 psi | 85% | 3097 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 56,231 psi | 88% | 3100 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 57,000 psi | 89% | 3153 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,702 psi | 73% | 2989 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,174 psi | 90% | 3081 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,276 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,566 psi | 90% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,840 psi | 88% | 3136 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,389 psi | 85% | 3166 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 56,710 psi | 89% | 3031 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,985 psi | 89% | 3081 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,071 psi | 86% | 3068 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 98% | 55,463 psi | 87% | 3127 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 56,173 psi | 88% | 3061 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,520 psi | 85% | 3035 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 54,781 psi | 86% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,651 psi | 87% | 3071 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,940 psi | 86% | 3084 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,941 psi | 88% | 3058 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,913 psi | 89% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,404 psi | 85% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,201 psi | 85% | 2982 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,969 psi | 86% | 3120 fps | 97.6% |
| Somchem S335 | <<locked>> | 82% | 56,550 psi | 89% | 2956 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,768 psi | 89% | 3074 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 57,450 psi | 90% | 3156 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,086 psi | 88% | 3100 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 57,450 psi | 90% | 2943 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,130 psi | 90% | 2989 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,450 psi | 90% | 3005 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,679 psi | 86% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,579 psi | 89% | 3094 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,895 psi | 81% | 3015 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 55,622 psi | 87% | 2999 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,695 psi | 87% | 3097 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,507 psi | 89% | 3159 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 3219 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,579 psi | 89% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,549 psi | 85% | 3110 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,687 psi | 72% | 3130 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,072 psi | 88% | 3068 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3097 fps | 97.6% |
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% | 51,140 psi | 80% | 2904 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,936 psi | 77% | 2897 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 38,072 psi | 60% | 2753 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 48,428 psi | 76% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,854 psi | 58% | 2743 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 80% | 53,809 psi | 84% | 3031 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,687 psi | 72% | 2874 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 46,615 psi | 73% | 2966 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 51,010 psi | 80% | 3074 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,546 psi | 79% | 3097 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,282 psi | 73% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,356 psi | 77% | 2972 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,056 psi | 56% | 2756 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,857 psi | 64% | 2894 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,166 psi | 72% | 2956 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 46,702 psi | 73% | 3012 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,123 psi | 44% | 2543 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,187 psi | 57% | 2789 fps | 95.6% |
| Alliant Reloder-26 | 74.1 gr | 86% | 34,780 psi | 55% | 2795 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,766 psi | 84% | 3048 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 45,847 psi | 72% | 2992 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,543 psi | 73% | 2910 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 46,702 psi | 73% | 3012 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 43,671 psi | 68% | 2828 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,920 psi | 74% | 2920 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 41,495 psi | 65% | 2854 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 44,541 psi | 70% | 2881 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,534 psi | 84% | 3068 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,446 psi | 52% | 2644 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,242 psi | 80% | 3025 fps | 100% |
| Hodgdon Superformance | 72.9 gr | 82% | 40,756 psi | 64% | 2867 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,054 psi | 82% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,051 psi | 75% | 2910 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,488 psi | 79% | 2943 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 41,785 psi | 65% | 2805 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,467 psi | 67% | 2802 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 35,462 psi | 56% | 2697 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 50,633 psi | 79% | 3005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,808 psi | 83% | 3018 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 52,794 psi | 83% | 2956 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,385 psi | 76% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,885 psi | 63% | 2746 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 40,683 psi | 64% | 2782 fps | 95.8% |
| Lovex S071 | <<locked>> | 94% | 36,811 psi | 58% | 2720 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 52,620 psi | 82% | 2976 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,330 psi | 84% | 2976 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,718 psi | 76% | 2959 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,398 psi | 74% | 2959 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 40,132 psi | 63% | 2897 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,666 psi | 57% | 2740 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,095 psi | 77% | 2982 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 38,174 psi | 60% | 2785 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 43,366 psi | 68% | 2917 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 43% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,978 psi | 74% | 2900 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,388 psi | 84% | 3100 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,424 psi | 68% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,651 psi | 57% | 2759 fps | 96.7% |
| ReloadSwiss RS 70 | 68.3 gr | 80% | 35,665 psi | 56% | 2762 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,111 psi | 79% | 2927 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,787 psi | 69% | 2854 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 51,634 psi | 81% | 3005 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 45,353 psi | 71% | 2940 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 43,671 psi | 68% | 2828 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,885 psi | 63% | 2746 fps | 96.7% |
| Shooters World Precision | <<locked>> | 80% | 48,385 psi | 76% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,683 psi | 64% | 2782 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,904 psi | 70% | 2907 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,344 psi | 82% | 3002 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,316 psi | 84% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,063 psi | 71% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,204 psi | 61% | 2690 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,933 psi | 70% | 2933 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 53,127 psi | 83% | 2907 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,106 psi | 69% | 2854 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 33,214 psi | 52% | 2697 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 43,033 psi | 67% | 2861 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 53,867 psi | 84% | 2890 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,299 psi | 79% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,560 psi | 79% | 2904 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,105 psi | 66% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,072 psi | 60% | 2743 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 96% | 45,252 psi | 71% | 2894 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 48,892 psi | 77% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,594 psi | 59% | 2740 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 30,951 psi | 49% | 2625 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 98% | 53,461 psi | 84% | 3150 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,347 psi | 59% | 2710 fps | 99.1% |
| Winchester 760 | <<locked>> | 82% | 41,684 psi | 65% | 2861 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,413 psi | 45% | 2638 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,388 psi | 82% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,716 psi | 72% | 2907 fps | 95.2% |
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 .311 | 155gr | Frontier FBSP. Norma MRP delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,228 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 155.0 gr projectile in 0.311" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 Weath. Mag. with the .311 | 155gr | Frontier FBSP 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.