Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 155gr | SUS-TAC HP bullet and 96 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-16 and Ramshot Hunter.
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>> | 86% | 56,333 psi | 90% | 2949 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,520 psi | 87% | 2949 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,094 psi | 76% | 2907 fps | 97.6% |
| Accurate 4064 | <<locked>> | 86% | 53,026 psi | 85% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,040 psi | 85% | 3038 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 56,028 psi | 90% | 3031 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,679 psi | 86% | 2979 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,433 psi | 87% | 3068 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,650 psi | 88% | 2972 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,173 psi | 90% | 2949 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,188 psi | 90% | 3159 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,012 psi | 87% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,360 psi | 87% | 3022 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,940 psi | 86% | 3097 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,259 psi | 89% | 3133 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,447 psi | 86% | 3054 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,512 psi | 71% | 2936 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,386 psi | 81% | 3120 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,941 psi | 90% | 3045 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 54,621 psi | 88% | 3015 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,476 psi | 87% | 2989 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,057 psi | 90% | 2956 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,491 psi | 87% | 3005 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,317 psi | 89% | 3031 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 55,709 psi | 89% | 3091 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 55,869 psi | 90% | 3051 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 53,055 psi | 85% | 2982 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,099 psi | 87% | 3022 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 52,924 psi | 85% | 3018 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,144 psi | 90% | 3130 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 57% | 1880 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,215 psi | 87% | 2989 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,272 psi | 85% | 2969 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,156 psi | 85% | 2963 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,057 psi | 90% | 2992 fps | 98.3% |
| IMR 4350 | <<locked>> | 96% | 55,216 psi | 89% | 3022 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,115 psi | 90% | 3022 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 53,650 psi | 86% | 3028 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 55,782 psi | 89% | 3054 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,650 psi | 88% | 2972 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,115 psi | 90% | 3002 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,984 psi | 88% | 2949 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,113 psi | 85% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,970 psi | 90% | 3015 fps | 99.2% |
| Lovex S070 | <<locked>> | 94% | 53,824 psi | 86% | 3002 fps | 98.1% |
| Norma 201 | <<locked>> | 84% | 54,549 psi | 87% | 2969 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,317 psi | 89% | 2972 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,650 psi | 86% | 3009 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,854 psi | 90% | 3071 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 49,980 psi | 80% | 3074 fps | 97.3% |
| Norma URP | <<locked>> | 96% | 55,550 psi | 89% | 3081 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 54,404 psi | 87% | 3038 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,331 psi | 87% | 3074 fps | 98.8% |
| Ramshot TAC | <<locked>> | 82% | 54,984 psi | 88% | 2995 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,839 psi | 88% | 3015 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 58% | 1923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,506 psi | 89% | 3012 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,940 psi | 88% | 3091 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,897 psi | 88% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,692 psi | 84% | 3058 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,651 psi | 89% | 3146 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 55,637 psi | 89% | 2953 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,317 psi | 89% | 2972 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,752 psi | 88% | 3012 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,576 psi | 84% | 3041 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 92% | 54,476 psi | 87% | 2989 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,970 psi | 90% | 3015 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,115 psi | 90% | 3002 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,113 psi | 85% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,824 psi | 86% | 3002 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,362 psi | 90% | 3074 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,476 psi | 86% | 2969 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,302 psi | 87% | 2995 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,869 psi | 90% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,026 psi | 85% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,985 psi | 90% | 2966 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 3035 fps | 96.3% |
| Somchem S335 | <<locked>> | 84% | 55,245 psi | 89% | 2904 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,127 psi | 85% | 2959 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 54,868 psi | 88% | 3009 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,114 psi | 87% | 3084 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,316 psi | 85% | 3018 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 84% | 56,246 psi | 90% | 2890 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,187 psi | 88% | 2933 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,767 psi | 89% | 2949 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,202 psi | 90% | 2986 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,331 psi | 87% | 3022 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 55,245 psi | 89% | 2976 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,172 psi | 87% | 2946 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,476 psi | 86% | 3025 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,443 psi | 79% | 3018 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,331 psi | 87% | 2992 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,550 psi | 89% | 3025 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,709 psi | 89% | 3091 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,001 psi | 64% | 2963 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,476 psi | 87% | 3009 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 2495 | <<locked>> | 80% | 46,209 psi | 74% | 2799 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,788 psi | 72% | 2772 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 38,348 psi | 61% | 2733 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,714 psi | 70% | 2795 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,925 psi | 56% | 2674 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 49,356 psi | 79% | 2920 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,887 psi | 67% | 2759 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 51,053 psi | 82% | 3009 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,401 psi | 82% | 2923 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,562 psi | 84% | 2900 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,339 psi | 73% | 2959 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,858 psi | 67% | 2782 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,918 psi | 72% | 2851 fps | 99% |
| Alliant Reloder-16 | 57.7 gr | 82% | 34,708 psi | 56% | 2687 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,463 psi | 58% | 2759 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 50,285 psi | 81% | 2999 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,429 psi | 49% | 2589 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,215 psi | 56% | 2779 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,907 psi | 78% | 2927 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,887 psi | 67% | 2789 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 45,266 psi | 73% | 2818 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,823 psi | 85% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,778 psi | 81% | 2946 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,467 psi | 68% | 2792 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 42,525 psi | 68% | 2844 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 48,979 psi | 79% | 2930 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,850 psi | 80% | 2930 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,994 psi | 48% | 2520 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,253 psi | 74% | 2907 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 45,179 psi | 72% | 2927 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 43% | 1683 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,688 psi | 76% | 2877 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,879 psi | 80% | 2917 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,034 psi | 71% | 2795 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,296 psi | 74% | 2818 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 45,542 psi | 73% | 2844 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,874 psi | 70% | 2795 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 33,721 psi | 54% | 2625 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 46,064 psi | 74% | 2884 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 51,401 psi | 82% | 2923 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,023 psi | 79% | 2894 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,733 psi | 78% | 2848 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 44,106 psi | 71% | 2799 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,624 psi | 62% | 2684 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 41,698 psi | 67% | 2769 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 48,225 psi | 77% | 2864 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,660 psi | 78% | 2867 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,324 psi | 71% | 2841 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 52,127 psi | 84% | 3005 fps | 95.8% |
| Norma MRP | <<locked>> | 96% | 43,381 psi | 70% | 2940 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 35,085 psi | 56% | 2674 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,135 psi | 71% | 2854 fps | 99.1% |
| Ramshot Hunter | 64.1 gr | 86% | 38,885 psi | 62% | 2769 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 51,401 psi | 82% | 2933 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,169 psi | 82% | 2953 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,108 psi | 43% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,743 psi | 69% | 2776 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,022 psi | 77% | 2972 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,769 psi | 62% | 2828 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,751 psi | 56% | 2690 fps | 95.4% |
| ReloadSwiss RS 70 | 64.6 gr | 84% | 36,680 psi | 59% | 2753 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 52,359 psi | 84% | 2904 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,919 psi | 74% | 2815 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,334 psi | 63% | 2730 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 48,994 psi | 79% | 2976 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 86% | 45,266 psi | 73% | 2818 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,624 psi | 62% | 2684 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,023 psi | 79% | 2894 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,106 psi | 71% | 2799 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,698 psi | 67% | 2769 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,524 psi | 65% | 2785 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,024 psi | 80% | 2913 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,863 psi | 77% | 2887 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,211 psi | 79% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,278 psi | 66% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,163 psi | 69% | 2736 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,530 psi | 78% | 2969 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 48,950 psi | 78% | 2805 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,777 psi | 80% | 2907 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 40,001 psi | 64% | 2736 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 29,472 psi | 47% | 2562 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 46,702 psi | 75% | 2900 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 49,647 psi | 80% | 2795 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,730 psi | 73% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,079 psi | 74% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,058 psi | 61% | 2664 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 34,171 psi | 55% | 2618 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 51,648 psi | 83% | 2920 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,527 psi | 71% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,998 psi | 58% | 2674 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 33,127 psi | 53% | 2671 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,765 psi | 54% | 2592 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 51,982 psi | 83% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,685 psi | 68% | 2848 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,689 psi | 46% | 2608 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,543 psi | 76% | 2890 fps | 99.8% |
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 115 powders for .300 Win. Mag. loaded with the .308 | 155gr | SUS-TAC HP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,159 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, 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. ReloadSwiss RS 70, Alliant Reloder-16, Ramshot Hunter rank at the top here: for .300 Win. Mag. with the .308 | 155gr | SUS-TAC HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, 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.