Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 168gr | Hammer HHT bullet and 99 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 Alliant Reloder-26.
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>> | 84% | 56,028 psi | 90% | 2848 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,753 psi | 89% | 2877 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,503 psi | 83% | 2900 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 56,275 psi | 90% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,722 psi | 86% | 2956 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,970 psi | 90% | 2936 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,824 psi | 86% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,216 psi | 89% | 3002 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,881 psi | 85% | 2986 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,591 psi | 84% | 3005 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,302 psi | 87% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,418 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,897 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,173 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,404 psi | 87% | 2989 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,503 psi | 83% | 2982 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,356 psi | 78% | 2917 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,264 psi | 68% | 2831 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,782 psi | 89% | 3120 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,985 psi | 90% | 2953 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,152 psi | 76% | 2900 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 54,839 psi | 88% | 2923 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,503 psi | 83% | 2982 fps | 97.4% |
| Bofors RP7 | <<locked>> | 90% | 54,607 psi | 88% | 2910 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 86% | 55,448 psi | 89% | 2943 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 53,896 psi | 86% | 2972 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 54,433 psi | 87% | 2943 fps | 98% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,535 psi | 89% | 2976 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,143 psi | 88% | 2940 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,447 psi | 86% | 2930 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,663 psi | 84% | 2986 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 58% | 1827 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,287 psi | 85% | 2881 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,898 psi | 90% | 2904 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,970 psi | 90% | 2913 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,781 psi | 88% | 2890 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 55,564 psi | 89% | 2943 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,347 psi | 90% | 2940 fps | 99% |
| IMR 4831 | <<locked>> | 98% | 55,216 psi | 89% | 2963 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,840 psi | 90% | 2959 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,752 psi | 88% | 2927 fps | 96% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,273 psi | 87% | 3028 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 82% | 56,130 psi | 90% | 2907 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,781 psi | 88% | 2858 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,055 psi | 85% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,173 psi | 90% | 2933 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 54,099 psi | 87% | 2920 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,424 psi | 68% | 2736 fps | 97.6% |
| Norma 201 | <<locked>> | 82% | 54,346 psi | 87% | 2874 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,317 psi | 89% | 2874 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,693 psi | 86% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 92% | 52,591 psi | 84% | 2933 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 54,694 psi | 88% | 3071 fps | 99% |
| Norma URP | <<locked>> | 94% | 56,217 psi | 90% | 2995 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,534 psi | 87% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,969 psi | 87% | 3031 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 55,230 psi | 89% | 2999 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,473 psi | 81% | 2943 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 59% | 1870 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,521 psi | 89% | 2927 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,376 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,579 psi | 89% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,737 psi | 86% | 2979 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,405 psi | 90% | 3071 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 55,071 psi | 88% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,940 psi | 88% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,388 psi | 86% | 2913 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 98% | 53,388 psi | 86% | 2969 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 54,607 psi | 88% | 2910 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,173 psi | 90% | 2933 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,130 psi | 90% | 2907 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 53,055 psi | 85% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,099 psi | 87% | 2920 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,171 psi | 85% | 2927 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,244 psi | 87% | 2904 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,361 psi | 89% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,098 psi | 85% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,159 psi | 90% | 2887 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 52,924 psi | 85% | 2963 fps | 97.6% |
| Somchem S335 | <<locked>> | 82% | 54,984 psi | 88% | 2805 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,027 psi | 88% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,984 psi | 88% | 2904 fps | 95.8% |
| Somchem S365 | <<locked>> | 96% | 55,477 psi | 89% | 2999 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,143 psi | 87% | 2946 fps | 98.5% |
| Unknown powder | <<locked>> | 90% | 53,359 psi | 86% | 2946 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 82% | 55,912 psi | 90% | 2789 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,317 psi | 89% | 2835 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,970 psi | 90% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,939 psi | 85% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,911 psi | 88% | 2940 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,966 psi | 80% | 2864 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 53,998 psi | 87% | 2848 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,969 psi | 87% | 2943 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,186 psi | 87% | 2999 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,129 psi | 88% | 3061 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,665 psi | 88% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,896 psi | 86% | 2972 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,642 psi | 70% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,362 psi | 90% | 2972 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% | 49,081 psi | 79% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,728 psi | 69% | 2648 fps | 95.8% |
| Accurate 3100 | <<locked>> | 90% | 36,143 psi | 58% | 2602 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 46,528 psi | 75% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,157 psi | 56% | 2598 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 80% | 52,446 psi | 84% | 2881 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,469 psi | 71% | 2726 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 45,121 psi | 72% | 2818 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 98% | 49,400 psi | 79% | 2923 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,110 psi | 79% | 2943 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,744 psi | 72% | 2749 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,950 psi | 77% | 2822 fps | 99.8% |
| Alliant Reloder-16 | 58 gr | 80% | 34,693 psi | 56% | 2612 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,305 psi | 63% | 2743 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,628 psi | 72% | 2808 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,947 psi | 72% | 2858 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,745 psi | 43% | 2405 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,679 psi | 56% | 2644 fps | 95.6% |
| Alliant Reloder-26 | 68.8 gr | 86% | 33,025 psi | 53% | 2644 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,272 psi | 84% | 2894 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 44,063 psi | 71% | 2841 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,773 psi | 72% | 2759 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,947 psi | 72% | 2858 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,668 psi | 64% | 2625 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 45,426 psi | 73% | 2769 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 40,727 psi | 65% | 2723 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 84% | 42,279 psi | 68% | 2717 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,880 psi | 83% | 2913 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,082 psi | 51% | 2503 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,804 psi | 75% | 2822 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,175 psi | 63% | 2720 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 43% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,920 psi | 75% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,153 psi | 79% | 2802 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,714 psi | 70% | 2707 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,859 psi | 69% | 2671 fps | 96.7% |
| IMR 4350 | <<locked>> | 84% | 40,350 psi | 65% | 2661 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,234 psi | 66% | 2661 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 30,647 psi | 49% | 2464 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 49,197 psi | 79% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,314 psi | 82% | 2867 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 50,662 psi | 81% | 2963 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 80% | 52,489 psi | 84% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,648 psi | 83% | 2808 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,949 psi | 75% | 2762 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,551 psi | 62% | 2605 fps | 96.8% |
| Lovex S070 | <<locked>> | 82% | 39,204 psi | 63% | 2638 fps | 95.8% |
| Lovex S071 | <<locked>> | 94% | 34,795 psi | 56% | 2569 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 51,126 psi | 82% | 2825 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,808 psi | 83% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,282 psi | 76% | 2808 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,948 psi | 74% | 2812 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 38,319 psi | 61% | 2746 fps | 95% |
| Norma URP | <<locked>> | 80% | 35,215 psi | 56% | 2595 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 47,645 psi | 76% | 2831 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 49,951 psi | 80% | 2959 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 82% | 36,564 psi | 59% | 2638 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 43,250 psi | 69% | 2805 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 44% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,571 psi | 73% | 2756 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,735 psi | 83% | 2940 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,872 psi | 67% | 2805 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,969 psi | 56% | 2612 fps | 96.7% |
| ReloadSwiss RS 70 | 63.5 gr | 80% | 34,360 psi | 55% | 2618 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 48,530 psi | 78% | 2772 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,076 psi | 67% | 2700 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,966 psi | 80% | 2854 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 43,613 psi | 70% | 2792 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,668 psi | 64% | 2625 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,551 psi | 62% | 2605 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,489 psi | 84% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,949 psi | 75% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,204 psi | 63% | 2638 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,424 psi | 70% | 2759 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,894 psi | 82% | 2851 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,025 psi | 83% | 2759 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,816 psi | 70% | 2621 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,681 psi | 60% | 2546 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,207 psi | 69% | 2785 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,793 psi | 83% | 2759 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,670 psi | 68% | 2707 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 51,561 psi | 83% | 2848 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 31,589 psi | 51% | 2546 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 41,249 psi | 66% | 2710 fps | 95.5% |
| Unknown powder | <<locked>> | 80% | 38,189 psi | 61% | 2657 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 80% | 52,591 psi | 84% | 2743 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,762 psi | 78% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,124 psi | 79% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,640 psi | 65% | 2635 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,724 psi | 59% | 2602 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 96% | 43,627 psi | 70% | 2746 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 47,514 psi | 76% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,172 psi | 58% | 2598 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 29,414 psi | 47% | 2484 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 98% | 51,300 psi | 82% | 2989 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,998 psi | 58% | 2572 fps | 99.1% |
| Winchester 760 | <<locked>> | 80% | 40,727 psi | 65% | 2723 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,890 psi | 43% | 2487 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,179 psi | 72% | 2782 fps | 95.5% |
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 108 powders for .300 Win. Mag. loaded with the .308 | 168gr | Hammer HHT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,120 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:13.5 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. ReloadSwiss RS 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .308 | 168gr | Hammer HHT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 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.