Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 168gr | Reichenberg HDB KUHS bullet and 95 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% | 55,347 psi | 89% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,983 psi | 87% | 2858 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,821 psi | 81% | 2884 fps | 99% |
| Accurate 4064 | <<locked>> | 86% | 55,912 psi | 90% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,127 psi | 85% | 2943 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 55,405 psi | 89% | 2923 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,301 psi | 85% | 2877 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,534 psi | 87% | 2986 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,985 psi | 90% | 3054 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,751 psi | 86% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,085 psi | 87% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,360 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,666 psi | 89% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,766 psi | 86% | 2972 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,836 psi | 82% | 2966 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,877 psi | 77% | 2907 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,713 psi | 67% | 2818 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,071 psi | 88% | 3104 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,477 psi | 89% | 2943 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,543 psi | 75% | 2887 fps | 95.9% |
| Bofors RP3 | <<locked>> | 86% | 54,302 psi | 87% | 2913 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,836 psi | 82% | 2966 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 54,128 psi | 87% | 2897 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 54,926 psi | 88% | 2930 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,854 psi | 90% | 3002 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 55,593 psi | 89% | 2959 fps | 98.1% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,217 psi | 90% | 2982 fps | 96% |
| Hodgdon H4895 | <<locked>> | 82% | 56,014 psi | 90% | 2933 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,389 psi | 87% | 2927 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,275 psi | 90% | 2969 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,231 psi | 90% | 3041 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,172 psi | 58% | 1824 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,664 psi | 86% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,130 psi | 90% | 2913 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,463 psi | 89% | 2897 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 55,085 psi | 88% | 2930 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,883 psi | 90% | 2930 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 53,737 psi | 86% | 2936 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,521 psi | 89% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,128 psi | 87% | 2913 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 82% | 55,535 psi | 89% | 2894 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,491 psi | 87% | 2851 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,043 psi | 90% | 2904 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,709 psi | 89% | 2920 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,403 psi | 86% | 2907 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,003 psi | 67% | 2726 fps | 97.4% |
| Norma 201 | <<locked>> | 82% | 53,983 psi | 87% | 2864 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,752 psi | 88% | 2864 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,374 psi | 86% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,840 psi | 90% | 2982 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 54,027 psi | 87% | 3054 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 55,709 psi | 89% | 2986 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,027 psi | 87% | 2933 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,534 psi | 87% | 2986 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 59% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,056 psi | 88% | 2917 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,998 psi | 88% | 2989 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,042 psi | 88% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,011 psi | 85% | 2966 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,709 psi | 89% | 3058 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,723 psi | 88% | 2867 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,375 psi | 87% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,362 psi | 90% | 2956 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 52,968 psi | 85% | 2959 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 54,128 psi | 87% | 2897 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,709 psi | 89% | 2920 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,535 psi | 89% | 2894 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,043 psi | 90% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,403 psi | 86% | 2907 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,649 psi | 84% | 2917 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,983 psi | 87% | 2897 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,969 psi | 88% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,927 psi | 90% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,506 psi | 89% | 2874 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 3009 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 54,665 psi | 88% | 2795 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,420 psi | 90% | 2917 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,505 psi | 87% | 2907 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,911 psi | 88% | 2989 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,505 psi | 86% | 2933 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 82% | 55,564 psi | 89% | 2782 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,911 psi | 88% | 2825 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,390 psi | 89% | 2844 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,057 psi | 90% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,433 psi | 87% | 2927 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 2848 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 84% | 53,519 psi | 86% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,505 psi | 86% | 2930 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,417 psi | 86% | 2982 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,505 psi | 87% | 3045 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,230 psi | 87% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,854 psi | 90% | 3002 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,091 psi | 69% | 2953 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,012 psi | 87% | 2900 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,867 psi | 86% | 2930 fps | 97.4% |
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% | 48,486 psi | 78% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,166 psi | 76% | 2740 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 35,723 psi | 57% | 2589 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 45,934 psi | 74% | 2740 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,679 psi | 56% | 2582 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 80% | 51,909 psi | 83% | 2871 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,135 psi | 71% | 2717 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 44,686 psi | 72% | 2805 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,588 psi | 78% | 2930 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,411 psi | 71% | 2743 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,398 psi | 76% | 2808 fps | 99.8% |
| Alliant Reloder-16 | 57.5 gr | 80% | 34,403 psi | 55% | 2602 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,841 psi | 62% | 2730 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,237 psi | 71% | 2795 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,324 psi | 71% | 2844 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,268 psi | 45% | 2451 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,374 psi | 55% | 2635 fps | 95.3% |
| Alliant Reloder-26 | 68.2 gr | 86% | 32,648 psi | 52% | 2631 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,793 psi | 83% | 2884 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,497 psi | 70% | 2825 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 44,425 psi | 71% | 2749 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,324 psi | 71% | 2844 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 41,930 psi | 67% | 2671 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 44,933 psi | 72% | 2756 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 39,697 psi | 64% | 2700 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 42,931 psi | 69% | 2726 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 98% | 52,431 psi | 84% | 2920 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,460 psi | 84% | 2881 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,778 psi | 51% | 2493 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,269 psi | 79% | 2861 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,684 psi | 67% | 2772 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 43% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,256 psi | 81% | 2828 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,398 psi | 74% | 2753 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,747 psi | 78% | 2782 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 39,885 psi | 64% | 2648 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,799 psi | 65% | 2648 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 33,533 psi | 54% | 2539 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 48,602 psi | 78% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,966 psi | 82% | 2858 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 51,938 psi | 83% | 2841 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,082 psi | 82% | 2799 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,398 psi | 74% | 2749 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,087 psi | 61% | 2592 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 38,740 psi | 62% | 2625 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 36,767 psi | 59% | 2615 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 50,546 psi | 81% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,474 psi | 83% | 2815 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,746 psi | 75% | 2795 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,513 psi | 73% | 2799 fps | 95.3% |
| Norma MRP | <<locked>> | 92% | 40,596 psi | 65% | 2795 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 34,925 psi | 56% | 2589 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,123 psi | 76% | 2818 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,303 psi | 58% | 2628 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,369 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,121 psi | 72% | 2743 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,358 psi | 82% | 2933 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,365 psi | 66% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,664 psi | 56% | 2605 fps | 96.5% |
| ReloadSwiss RS 70 | 62.9 gr | 80% | 33,953 psi | 54% | 2608 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 48,153 psi | 77% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,742 psi | 67% | 2694 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 49,530 psi | 79% | 2844 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 92% | 43,178 psi | 69% | 2779 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 41,930 psi | 67% | 2671 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,087 psi | 61% | 2592 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,938 psi | 83% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,398 psi | 74% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,740 psi | 62% | 2625 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,120 psi | 69% | 2749 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,575 psi | 81% | 2841 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,634 psi | 83% | 2749 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,468 psi | 70% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,420 psi | 60% | 2539 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,772 psi | 69% | 2772 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 51,256 psi | 82% | 2746 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,649 psi | 84% | 2861 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,148 psi | 68% | 2694 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 31,285 psi | 50% | 2536 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 40,843 psi | 65% | 2700 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 52,214 psi | 84% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,327 psi | 77% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,791 psi | 78% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,350 psi | 65% | 2625 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,260 psi | 58% | 2589 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 43,018 psi | 69% | 2733 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 47,007 psi | 75% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,723 psi | 57% | 2585 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 28,950 psi | 46% | 2470 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 98% | 50,952 psi | 82% | 2982 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,607 psi | 57% | 2562 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 39,856 psi | 64% | 2703 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,585 psi | 43% | 2474 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,343 psi | 81% | 2844 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,731 psi | 75% | 2808 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 108 powders for .300 Win. Mag. loaded with the .308 | 168gr | Reichenberg HDB KUHS. Alliant Reloder-26 delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,104 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 58–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:12.5 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 | Reichenberg HDB KUHS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, Bofors RP30, Hodgdon H1000 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.