Load Specifications
Load data in caliber .300 WSM with .308 | 155gr | Brenneke TAG bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon Superformance 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.
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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 2015 | <<locked>> | 84% | 54,839 psi | 86% | 2887 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,884 psi | 89% | 2966 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,927 psi | 89% | 2956 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 57,421 psi | 90% | 3015 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 57,725 psi | 90% | 2966 fps | 97.3% |
| Accurate 4064 | <<locked>> | 92% | 56,913 psi | 89% | 3005 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,363 psi | 90% | 3097 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 57,580 psi | 90% | 3045 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,274 psi | 87% | 2992 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,666 psi | 89% | 2992 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,624 psi | 90% | 2966 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,925 psi | 85% | 3110 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,158 psi | 86% | 3012 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,825 psi | 87% | 3035 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3097 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,492 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,943 psi | 61% | 2808 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,685 psi | 68% | 2976 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,070 psi | 85% | 3005 fps | 99.5% |
| Bofors RP3 | <<locked>> | 92% | 55,767 psi | 87% | 3028 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,883 psi | 88% | 2995 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,897 psi | 86% | 2927 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,231 psi | 88% | 3025 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,505 psi | 85% | 3071 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 56,623 psi | 89% | 2976 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,985 psi | 89% | 3045 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 54,534 psi | 85% | 3061 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 98% | 55,114 psi | 86% | 3022 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 86% | 54,708 psi | 86% | 3002 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,068 psi | 80% | 2969 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,288 psi | 85% | 3038 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,711 psi | 90% | 3136 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 55% | 1844 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,853 psi | 86% | 2986 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,507 psi | 89% | 3009 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,392 psi | 90% | 3015 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,753 psi | 89% | 2986 fps | 97.9% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,289 psi | 88% | 3022 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,462 psi | 85% | 2976 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,051 psi | 75% | 2930 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 57,261 psi | 90% | 3068 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,666 psi | 89% | 2992 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,695 psi | 89% | 2976 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,421 psi | 90% | 3015 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,043 psi | 89% | 2969 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,302 psi | 85% | 2966 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,072 psi | 89% | 3022 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 54,520 psi | 85% | 2999 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 56,275 psi | 88% | 2989 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,927 psi | 89% | 2989 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,998 psi | 86% | 3022 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 3077 fps | 96.2% |
| Norma URPᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3084 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 55,709 psi | 87% | 3048 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,187 psi | 86% | 3077 fps | 98.5% |
| Ramshot TAC | <<locked>> | 86% | 57,058 psi | 89% | 3015 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,594 psi | 89% | 3031 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,911 psi | 84% | 2940 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,781 psi | 56% | 1890 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,086 psi | 88% | 2972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,232 psi | 90% | 3025 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,521 psi | 89% | 3107 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,217 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3120 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,971 psi | 89% | 3156 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 86% | 56,811 psi | 89% | 2963 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,608 psi | 89% | 2982 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,622 psi | 87% | 3018 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,883 psi | 88% | 2995 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,072 psi | 89% | 3022 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,421 psi | 90% | 3015 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,302 psi | 85% | 2966 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,520 psi | 85% | 2999 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,682 psi | 90% | 3084 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,390 psi | 87% | 2989 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,246 psi | 88% | 3015 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,491 psi | 85% | 2877 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,810 psi | 86% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,143 psi | 85% | 2920 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 54,273 psi | 85% | 2972 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,217 psi | 90% | 2920 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,100 psi | 86% | 2982 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 55,912 psi | 88% | 3015 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 3028 fps | 100% |
| Unknown powder | <<locked>> | 98% | 57,595 psi | 90% | 3094 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 84% | 56,362 psi | 88% | 2871 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,493 psi | 90% | 2904 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,521 psi | 89% | 2946 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,623 psi | 89% | 2956 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 57,305 psi | 90% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,230 psi | 85% | 3002 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 56,434 psi | 88% | 3002 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,246 psi | 88% | 2982 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,534 psi | 85% | 3054 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,757 psi | 67% | 2894 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,883 psi | 88% | 3005 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,128 psi | 85% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,534 psi | 85% | 3061 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,838 psi | 55% | 2802 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,638 psi | 90% | 3045 fps | 100% |
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 2015 | <<locked>> | 80% | 48,240 psi | 76% | 2789 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,924 psi | 83% | 2907 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,567 psi | 64% | 2703 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,644 psi | 73% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 47,282 psi | 74% | 2792 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 38,421 psi | 60% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,824 psi | 55% | 2671 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,672 psi | 70% | 2822 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 37,927 psi | 59% | 2661 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,833 psi | 73% | 2831 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,065 psi | 74% | 2818 fps | 100% |
| Alliant Power Pro 2000-MR | 57.3 gr | 80% | 40,698 psi | 64% | 2848 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,478 psi | 59% | 2684 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,335 psi | 63% | 2749 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,201 psi | 55% | 2690 fps | 95.4% |
| Alliant Reloder-17 | 56.4 gr | 80% | 32,285 psi | 51% | 2638 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,198 psi | 50% | 2638 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,913 psi | 59% | 2841 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,077 psi | 69% | 2825 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 36,854 psi | 58% | 2680 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 46,311 psi | 73% | 2825 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,370 psi | 76% | 2818 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,687 psi | 72% | 2854 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,618 psi | 79% | 3005 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 49,763 psi | 78% | 2874 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,840 psi | 59% | 2687 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 88% | 44,077 psi | 69% | 2867 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 96% | 51,764 psi | 81% | 2966 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 45,121 psi | 71% | 2835 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,110 psi | 47% | 2520 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,595 psi | 60% | 2746 fps | 98.7% |
| Hodgdon Superformance | 68.5 gr | 92% | 46,195 psi | 72% | 2933 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 41% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,016 psi | 63% | 2717 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 41,031 psi | 64% | 2762 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,101 psi | 58% | 2638 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,425 psi | 70% | 2762 fps | 95.2% |
| IMR 4350 | <<locked>> | 94% | 46,499 psi | 73% | 2851 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,136 psi | 71% | 2805 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 34,621 psi | 54% | 2648 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,365 psi | 65% | 2782 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 46,833 psi | 73% | 2831 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 52,997 psi | 83% | 2920 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,700 psi | 68% | 2799 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,657 psi | 70% | 2759 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 39,566 psi | 62% | 2700 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 39,146 psi | 61% | 2687 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 45,179 psi | 71% | 2831 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 43,526 psi | 68% | 2769 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 44,005 psi | 69% | 2779 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,697 psi | 62% | 2736 fps | 98.1% |
| Norma 204 | <<locked>> | 98% | 53,447 psi | 84% | 3012 fps | 95.4% |
| Norma URP | <<locked>> | 86% | 35,317 psi | 55% | 2677 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,378 psi | 62% | 2749 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 42,090 psi | 66% | 2835 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 46,789 psi | 73% | 2838 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,166 psi | 72% | 2854 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,546 psi | 79% | 2884 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,585 psi | 42% | 1690 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,417 psi | 82% | 2917 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,845 psi | 69% | 2789 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,511 psi | 67% | 2858 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,461 psi | 54% | 2713 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,318 psi | 58% | 2753 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,074 psi | 63% | 2825 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 47,369 psi | 74% | 2815 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,307 psi | 65% | 2717 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 34,751 psi | 54% | 2621 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 46,311 psi | 73% | 2825 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,146 psi | 61% | 2687 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,700 psi | 68% | 2799 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,566 psi | 62% | 2700 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 45,179 psi | 71% | 2831 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,868 psi | 56% | 2674 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,976 psi | 70% | 2808 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,134 psi | 68% | 2789 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,918 psi | 70% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,304 psi | 58% | 2582 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,193 psi | 69% | 2746 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 50,792 psi | 80% | 2917 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,570 psi | 70% | 2726 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,846 psi | 70% | 2808 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 35,636 psi | 56% | 2631 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 27,456 psi | 43% | 2497 fps | 95.5% |
| Unknown powder | <<locked>> | 86% | 38,464 psi | 60% | 2740 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 49,966 psi | 78% | 2779 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,409 psi | 66% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,872 psi | 64% | 2703 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,046 psi | 64% | 2703 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,284 psi | 47% | 2477 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 84% | 35,955 psi | 56% | 2654 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 49,400 psi | 77% | 2890 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,611 psi | 64% | 2720 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,477 psi | 57% | 2700 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 32,474 psi | 51% | 2654 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,153 psi | 47% | 2484 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 50,517 psi | 79% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,077 psi | 69% | 2867 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,414 psi | 48% | 2657 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,635 psi | 84% | 2986 fps | 100% |
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 118 powders for .300 WSM loaded with the .308 | 155gr | Brenneke TAG. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,156 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 WSM with the .308 | 155gr | Brenneke TAG they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.