Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 168gr | Barnes TTSX BT bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country 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.
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% | 56,115 psi | 88% | 2867 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,667 psi | 90% | 2953 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 2995 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 56,768 psi | 89% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,259 psi | 85% | 2989 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 53,896 psi | 84% | 3084 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 98% | 54,853 psi | 86% | 3084 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 57,029 psi | 89% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,593 psi | 87% | 3038 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3094 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,826 psi | 89% | 3097 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,666 psi | 87% | 3031 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,302 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,462 psi | 85% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,405 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,898 psi | 89% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,911 psi | 86% | 3025 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 3084 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 3012 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,890 psi | 72% | 2936 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,392 psi | 90% | 3159 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3005 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 55,216 psi | 87% | 2956 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 3084 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 54,491 psi | 85% | 2940 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 55,550 psi | 87% | 2972 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,724 psi | 89% | 3048 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 56,318 psi | 88% | 3005 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 98% | 57,217 psi | 90% | 3035 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,985 psi | 88% | 3015 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,724 psi | 87% | 2972 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,884 psi | 89% | 3005 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,962 psi | 70% | 2969 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 90% | 57,479 psi | 90% | 3087 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 57% | 1864 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,421 psi | 90% | 2969 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,347 psi | 88% | 2949 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,535 psi | 87% | 2933 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,738 psi | 87% | 2976 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,333 psi | 88% | 2972 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 55,027 psi | 86% | 2986 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,898 psi | 88% | 2986 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,911 psi | 86% | 2963 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3064 fps | 97.1% |
| Lovex S062 | <<locked>> | 84% | 56,579 psi | 89% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,420 psi | 88% | 2966 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 57,711 psi | 90% | 3009 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,485 psi | 73% | 2835 fps | 98.7% |
| Norma 203B | <<locked>> | 84% | 57,334 psi | 90% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,681 psi | 89% | 3028 fps | 98.3% |
| Norma MRP | <<locked>> | 98% | 55,985 psi | 88% | 3114 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 56,782 psi | 89% | 3028 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,723 psi | 86% | 2972 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,897 psi | 86% | 3081 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 55,666 psi | 87% | 3031 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,066 psi | 77% | 2946 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 58% | 1906 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,405 psi | 87% | 2956 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,246 psi | 88% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,476 psi | 85% | 3015 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,811 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,904 psi | 70% | 2959 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 55,027 psi | 86% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,288 psi | 87% | 2949 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,363 psi | 90% | 3012 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 54,317 psi | 85% | 3012 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,491 psi | 85% | 2940 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,420 psi | 88% | 2966 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,579 psi | 89% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,711 psi | 90% | 3009 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,174 psi | 90% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,260 psi | 88% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,072 psi | 88% | 2917 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,392 psi | 90% | 3064 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 55,129 psi | 86% | 2943 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,245 psi | 87% | 2943 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 56,405 psi | 88% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,810 psi | 86% | 2986 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 55,347 psi | 87% | 2858 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,724 psi | 87% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,681 psi | 89% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,245 psi | 87% | 2969 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 2959 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 84% | 57,522 psi | 90% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,389 psi | 85% | 2972 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,361 psi | 87% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,173 psi | 88% | 3104 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,955 psi | 86% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,942 psi | 89% | 3051 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,805 psi | 76% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,926 psi | 86% | 2979 fps | 98.1% |
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% | 52,475 psi | 82% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,560 psi | 79% | 2835 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,389 psi | 54% | 2579 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 49,792 psi | 78% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,159 psi | 60% | 2687 fps | 98.3% |
| Accurate High Country | 76.9 gr | 92% | 46,572 psi | 73% | 2949 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 96% | 51,039 psi | 80% | 3015 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,210 psi | 74% | 2805 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,467 psi | 67% | 2792 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 49,806 psi | 78% | 2966 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,866 psi | 83% | 3035 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,685 psi | 67% | 2792 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,877 psi | 75% | 2831 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,053 psi | 80% | 2900 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,231 psi | 58% | 2700 fps | 98.4% |
| Alliant Reloder-17 | 67.3 gr | 80% | 42,656 psi | 67% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,177 psi | 66% | 2782 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,583 psi | 67% | 2835 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,108 psi | 42% | 2434 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,967 psi | 52% | 2621 fps | 95.3% |
| Alliant Reloder-26 | 70.6 gr | 82% | 31,198 psi | 49% | 2612 fps | 95.4% |
| Bofors RP15 | <<locked>> | 94% | 41,974 psi | 66% | 2818 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 48,095 psi | 75% | 2841 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,583 psi | 67% | 2835 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,163 psi | 66% | 2707 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,515 psi | 76% | 2854 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,364 psi | 63% | 2740 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 43,279 psi | 68% | 2766 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 94% | 49,690 psi | 78% | 2907 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,330 psi | 82% | 2956 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,737 psi | 54% | 2589 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,301 psi | 84% | 2953 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,090 psi | 66% | 2900 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 39,407 psi | 62% | 2749 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 43% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,824 psi | 84% | 2917 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,661 psi | 78% | 2841 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,909 psi | 81% | 2874 fps | 98.8% |
| IMR 4350 | <<locked>> | 80% | 37,956 psi | 59% | 2631 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,656 psi | 68% | 2740 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 36,738 psi | 58% | 2638 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 52,388 psi | 82% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,327 psi | 76% | 2844 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 47,485 psi | 74% | 2933 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 49,908 psi | 78% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,060 psi | 64% | 2687 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,305 psi | 62% | 2664 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 33,330 psi | 52% | 2552 fps | 95% |
| Norma 203B | <<locked>> | 80% | 50,386 psi | 79% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,989 psi | 67% | 2779 fps | 95.2% |
| Norma MRP | <<locked>> | 88% | 39,001 psi | 61% | 2785 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 38,043 psi | 60% | 2684 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,068 psi | 80% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,384 psi | 74% | 2943 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 36,941 psi | 58% | 2667 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 94% | 39,102 psi | 61% | 2743 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,601 psi | 43% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,559 psi | 76% | 2838 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,339 psi | 71% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,159 psi | 60% | 2707 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,999 psi | 58% | 2713 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,885 psi | 61% | 2815 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 51,547 psi | 81% | 2848 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,223 psi | 71% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,094 psi | 74% | 2831 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 41,307 psi | 65% | 2766 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,163 psi | 66% | 2707 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,060 psi | 64% | 2687 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 49,908 psi | 78% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,305 psi | 62% | 2664 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,659 psi | 73% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,499 psi | 73% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,306 psi | 63% | 2631 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,930 psi | 64% | 2759 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 45,498 psi | 71% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,619 psi | 81% | 2881 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 34,577 psi | 54% | 2638 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,175 psi | 61% | 2687 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 51,967 psi | 81% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,228 psi | 82% | 2825 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,497 psi | 68% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,479 psi | 62% | 2684 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 41,292 psi | 65% | 2726 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,488 psi | 79% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,914 psi | 61% | 2684 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 30,052 psi | 47% | 2516 fps | 96.1% |
| Vihtavuori N560 | <<locked>> | 94% | 48,646 psi | 76% | 2969 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,682 psi | 61% | 2654 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 40,553 psi | 64% | 2743 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,585 psi | 40% | 2461 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,396 psi | 70% | 2792 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 91 powders for .300 Weath. Mag. loaded with the .308 | 168gr | Barnes TTSX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,159 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 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 168.0 gr projectile in 0.308" calls for a 1:11.0 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. Alliant Reloder-26, Accurate High Country, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 168gr | Barnes TTSX BT 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.