Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 168gr | Barnes TAC-TX BT bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-17 and Norma MRP.
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.
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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% | 55,056 psi | 86% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,927 psi | 89% | 2933 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 2976 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 55,535 psi | 87% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,058 psi | 89% | 3028 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3123 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 86% | 56,202 psi | 88% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,476 psi | 85% | 3015 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 3068 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,666 psi | 87% | 3074 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,797 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,159 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,273 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,506 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,522 psi | 90% | 3061 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 3061 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,837 psi | 81% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,744 psi | 70% | 2910 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,854 psi | 88% | 3136 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,082 psi | 78% | 2976 fps | 97.2% |
| Bofors RP3 | <<locked>> | 84% | 54,085 psi | 85% | 2933 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 3061 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 57,130 psi | 90% | 2976 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 84% | 54,476 psi | 85% | 2949 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 55,463 psi | 87% | 3022 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 55,332 psi | 87% | 2982 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 98% | 55,941 psi | 88% | 3009 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,737 psi | 86% | 2989 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,433 psi | 85% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,970 psi | 88% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,874 psi | 69% | 2940 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 90% | 56,072 psi | 88% | 3064 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1857 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,521 psi | 89% | 2953 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,434 psi | 87% | 2930 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,549 psi | 85% | 2910 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 54,810 psi | 86% | 2956 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,376 psi | 87% | 2949 fps | 99.2% |
| IMR 4831 | <<locked>> | 94% | 57,508 psi | 90% | 3018 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,955 psi | 86% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,551 psi | 90% | 2999 fps | 97% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,156 psi | 83% | 3035 fps | 96.7% |
| Lovex S060 | <<locked>> | 82% | 57,101 psi | 89% | 2917 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,666 psi | 87% | 2923 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,448 psi | 87% | 2946 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 56,753 psi | 89% | 2989 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,368 psi | 71% | 2812 fps | 98.5% |
| Norma 201 | <<locked>> | 82% | 56,826 psi | 89% | 2933 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,449 psi | 88% | 2979 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,550 psi | 87% | 3009 fps | 98% |
| Norma MRP | <<locked>> | 98% | 54,360 psi | 85% | 3084 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 55,724 psi | 87% | 3012 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,522 psi | 90% | 3009 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,635 psi | 84% | 3054 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 92% | 54,462 psi | 85% | 3009 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,703 psi | 75% | 2917 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,941 psi | 58% | 1900 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,418 psi | 85% | 2933 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,085 psi | 86% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,971 psi | 89% | 3048 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,637 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,787 psi | 69% | 2930 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 84% | 57,508 psi | 90% | 2933 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,143 psi | 85% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,260 psi | 88% | 2989 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 98% | 56,695 psi | 89% | 3048 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 90% | 57,130 psi | 90% | 2976 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,448 psi | 87% | 2946 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 55,666 psi | 87% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,753 psi | 89% | 2989 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,144 psi | 88% | 2995 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,855 psi | 89% | 2966 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,667 psi | 90% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,347 psi | 87% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,143 psi | 86% | 2897 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,202 psi | 88% | 3041 fps | 98.4% |
| Somchem S335 | <<locked>> | 82% | 57,305 psi | 90% | 2858 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,682 psi | 90% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,317 psi | 85% | 2920 fps | 96.1% |
| Somchem S365 | <<locked>> | 94% | 55,027 psi | 86% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,217 psi | 90% | 3018 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 54,491 psi | 85% | 2841 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,795 psi | 86% | 2858 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,666 psi | 87% | 2904 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,186 psi | 85% | 2949 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 2936 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 56,521 psi | 89% | 2904 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,826 psi | 89% | 3009 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,711 psi | 90% | 3071 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,621 psi | 86% | 3074 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,911 psi | 84% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,695 psi | 87% | 3025 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,949 psi | 74% | 3048 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,101 psi | 89% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,911 psi | 84% | 2956 fps | 97.9% |
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% | 51,634 psi | 81% | 2805 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,792 psi | 78% | 2818 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 33,620 psi | 53% | 2559 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 48,965 psi | 77% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,260 psi | 58% | 2664 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 53,577 psi | 84% | 3058 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 46,514 psi | 73% | 2789 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 44,556 psi | 70% | 2831 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 48,602 psi | 76% | 2936 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,677 psi | 81% | 3009 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,920 psi | 74% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,111 psi | 79% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,564 psi | 57% | 2680 fps | 98.1% |
| Alliant Reloder-17 | 66 gr | 80% | 41,611 psi | 65% | 2812 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,193 psi | 69% | 2822 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,713 psi | 65% | 2812 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,585 psi | 42% | 2415 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,519 psi | 54% | 2661 fps | 96% |
| Alliant Reloder-26 | 71 gr | 84% | 32,793 psi | 51% | 2657 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 43,859 psi | 69% | 2858 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 47,166 psi | 74% | 2822 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,713 psi | 65% | 2812 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 41,539 psi | 65% | 2690 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 47,616 psi | 75% | 2835 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 39,566 psi | 62% | 2720 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 42,482 psi | 67% | 2743 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 96% | 52,170 psi | 82% | 2946 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,053 psi | 80% | 2927 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,069 psi | 53% | 2572 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,185 psi | 82% | 2930 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,017 psi | 64% | 2871 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 38,551 psi | 60% | 2726 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 42% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,939 psi | 83% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,907 psi | 77% | 2825 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,097 psi | 80% | 2854 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 39,813 psi | 62% | 2671 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,076 psi | 68% | 2723 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 35,911 psi | 56% | 2618 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 51,416 psi | 81% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,502 psi | 79% | 2881 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 49,603 psi | 78% | 2972 fps | 95.8% |
| Lovex S060 | <<locked>> | 80% | 53,519 psi | 84% | 2864 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,994 psi | 77% | 2818 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,437 psi | 63% | 2671 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 38,508 psi | 60% | 2644 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 34,708 psi | 54% | 2585 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 53,403 psi | 84% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,458 psi | 78% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,266 psi | 71% | 2822 fps | 95.8% |
| Norma MRP | 72.2 gr | 88% | 38,000 psi | 60% | 2756 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 37,202 psi | 58% | 2661 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 50,009 psi | 78% | 2890 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,224 psi | 72% | 2913 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 36,201 psi | 57% | 2648 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 41,104 psi | 64% | 2782 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,543 psi | 43% | 1696 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,761 psi | 75% | 2818 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,266 psi | 69% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,188 psi | 58% | 2684 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,158 psi | 57% | 2687 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,000 psi | 60% | 2785 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,807 psi | 80% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,309 psi | 69% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 49,197 psi | 77% | 2867 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 43,308 psi | 68% | 2805 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,539 psi | 65% | 2690 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,437 psi | 63% | 2671 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 48,994 psi | 77% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,508 psi | 60% | 2644 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,818 psi | 72% | 2825 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,316 psi | 84% | 2910 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,143 psi | 85% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,774 psi | 72% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,552 psi | 62% | 2612 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,917 psi | 67% | 2799 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 53,954 psi | 85% | 2812 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,817 psi | 70% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,720 psi | 79% | 2861 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 33,721 psi | 53% | 2615 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 41,002 psi | 64% | 2726 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 51,111 psi | 80% | 2795 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,300 psi | 80% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,641 psi | 67% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,667 psi | 61% | 2664 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 40,451 psi | 63% | 2703 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 49,661 psi | 78% | 2802 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,145 psi | 60% | 2664 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 29,240 psi | 46% | 2493 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 51,024 psi | 80% | 3009 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,884 psi | 59% | 2635 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 39,566 psi | 62% | 2720 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,701 psi | 42% | 2503 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,476 psi | 84% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,381 psi | 68% | 2769 fps | 95.4% |
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 95 powders for .300 Weath. Mag. loaded with the .308 | 168gr | Barnes TAC-TX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,857 fps to 3,136 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 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 1:10.5 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-26, Alliant Reloder-17, Norma MRP rank at the top here: for .300 Weath. Mag. with the .308 | 168gr | Barnes TAC-TX 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.