Load Specifications
Load data in caliber .25-06 Rem. with .257 | 117gr | Sierra SPT Pro-Hunter bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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.
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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% | 57,711 psi | 88% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,813 psi | 90% | 2930 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,899 psi | 89% | 2979 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 58,291 psi | 89% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,854 psi | 86% | 2972 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,288 psi | 85% | 3068 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 98% | 56,304 psi | 86% | 3068 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 86% | 57,899 psi | 89% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,695 psi | 87% | 3018 fps | 98.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,320 psi | 89% | 3074 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,783 psi | 89% | 3071 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,927 psi | 87% | 3015 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,943 psi | 90% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,593 psi | 85% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,536 psi | 87% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 58,160 psi | 89% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,159 psi | 86% | 3005 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,522 psi | 88% | 3068 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,389 psi | 83% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,166 psi | 72% | 2923 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 58,914 psi | 90% | 3140 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,649 psi | 81% | 2986 fps | 98% |
| Bofors RP3 | <<locked>> | 84% | 56,463 psi | 87% | 2933 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,522 psi | 88% | 3068 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 55,622 psi | 85% | 2920 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,630 psi | 71% | 2854 fps | 96% |
| Hodgdon H380 | <<locked>> | 84% | 56,652 psi | 87% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,914 psi | 89% | 3028 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 57,232 psi | 88% | 2982 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 98% | 58,334 psi | 89% | 3012 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,232 psi | 88% | 2995 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,855 psi | 87% | 2949 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 58,044 psi | 89% | 2986 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,151 psi | 71% | 2959 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 90% | 58,740 psi | 90% | 3068 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 56% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,494 psi | 90% | 2949 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,217 psi | 88% | 2923 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,188 psi | 86% | 2907 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 56,753 psi | 87% | 2953 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,145 psi | 88% | 2946 fps | 99.5% |
| IMR 4831 | <<locked>> | 92% | 56,304 psi | 86% | 2963 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,014 psi | 87% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,956 psi | 86% | 2943 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,521 psi | 85% | 3045 fps | 97.5% |
| Lovex S060 | <<locked>> | 82% | 58,711 psi | 90% | 2910 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,537 psi | 88% | 2917 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,406 psi | 88% | 2943 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 58,885 psi | 90% | 2986 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,979 psi | 74% | 2825 fps | 99.1% |
| Norma 201 | <<locked>> | 82% | 58,827 psi | 90% | 2930 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,494 psi | 90% | 2976 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,740 psi | 88% | 3009 fps | 98.6% |
| Norma MRP | <<locked>> | 98% | 57,174 psi | 88% | 3094 fps | 99.6% |
| Norma URP | <<locked>> | 92% | 57,856 psi | 89% | 3005 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,666 psi | 85% | 2946 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,304 psi | 86% | 3064 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 56,753 psi | 87% | 3009 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,314 psi | 77% | 2930 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 57% | 1893 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,666 psi | 87% | 2936 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,377 psi | 88% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,898 psi | 86% | 2995 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 58,117 psi | 89% | 3081 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,441 psi | 71% | 2956 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 56,144 psi | 86% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,608 psi | 87% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 58,131 psi | 89% | 2986 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 55,463 psi | 85% | 2992 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 55,622 psi | 85% | 2920 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,406 psi | 88% | 2943 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 57,537 psi | 88% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,885 psi | 90% | 2986 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 58,073 psi | 89% | 2989 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,958 psi | 90% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,000 psi | 87% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,174 psi | 88% | 2897 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,784 psi | 90% | 3045 fps | 99% |
| Somchem S355 | <<locked>> | 86% | 56,434 psi | 86% | 2927 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,304 psi | 86% | 2920 fps | 96.8% |
| Somchem S365 | <<locked>> | 94% | 57,769 psi | 89% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,202 psi | 86% | 2969 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 56,724 psi | 87% | 2841 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,695 psi | 87% | 2851 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,841 psi | 89% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,463 psi | 87% | 2949 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,463 psi | 85% | 2940 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 84% | 58,566 psi | 90% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,651 psi | 85% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,782 psi | 87% | 3018 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,232 psi | 88% | 3081 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,927 psi | 86% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,914 psi | 89% | 3028 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,299 psi | 77% | 3061 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,202 psi | 86% | 2959 fps | 98.5% |
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% | 53,998 psi | 83% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,517 psi | 79% | 2815 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 33,446 psi | 51% | 2523 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 51,227 psi | 78% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,508 psi | 61% | 2684 fps | 98.7% |
| Accurate High Country | <<locked>> | 90% | 44,541 psi | 68% | 2871 fps | 95% |
| Accurate MAGPRO | <<locked>> | 96% | 52,315 psi | 80% | 2999 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 48,095 psi | 74% | 2789 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 43,439 psi | 67% | 2779 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 94% | 47,340 psi | 73% | 2881 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,998 psi | 83% | 3012 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,758 psi | 67% | 2779 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,907 psi | 75% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,127 psi | 80% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,319 psi | 59% | 2697 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,758 psi | 67% | 2822 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,265 psi | 66% | 2772 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,901 psi | 63% | 2762 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,094 psi | 43% | 2441 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,937 psi | 49% | 2562 fps | 95% |
| Alliant Reloder-26 | 47.2 gr | 80% | 30,240 psi | 46% | 2552 fps | 95.1% |
| Bofors RP15 | <<locked>> | 94% | 43,105 psi | 66% | 2808 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,458 psi | 76% | 2828 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,901 psi | 63% | 2762 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,265 psi | 66% | 2697 fps | 96.8% |
| Hodgdon H1000 | <<locked>> | 98% | 43,555 psi | 67% | 2792 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 49,792 psi | 76% | 2841 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 41,278 psi | 63% | 2726 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 44,266 psi | 68% | 2753 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 50,952 psi | 78% | 2894 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,719 psi | 76% | 2871 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,882 psi | 55% | 2585 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,418 psi | 83% | 2933 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,495 psi | 62% | 2828 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 40,466 psi | 62% | 2740 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 42% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,868 psi | 84% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,604 psi | 78% | 2822 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,750 psi | 81% | 2854 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,914 psi | 60% | 2625 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,672 psi | 68% | 2730 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 37,869 psi | 58% | 2635 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 53,476 psi | 82% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,298 psi | 76% | 2828 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 48,501 psi | 74% | 2917 fps | 95.8% |
| Lovex S060 | <<locked>> | 80% | 55,172 psi | 85% | 2858 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,937 psi | 78% | 2818 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,076 psi | 64% | 2674 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 40,364 psi | 62% | 2657 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 34,722 psi | 53% | 2556 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 55,201 psi | 85% | 2877 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,459 psi | 79% | 2871 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,034 psi | 67% | 2769 fps | 95.7% |
| Norma MRP | 49.2 gr | 86% | 37,376 psi | 57% | 2713 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,088 psi | 60% | 2674 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 52,170 psi | 80% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,310 psi | 69% | 2864 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 37,942 psi | 58% | 2661 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 40,234 psi | 62% | 2733 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 43% | 1696 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,647 psi | 76% | 2825 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,441 psi | 71% | 2877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,320 psi | 60% | 2700 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,101 psi | 58% | 2710 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,362 psi | 57% | 2740 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 52,634 psi | 81% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,456 psi | 71% | 2769 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,109 psi | 74% | 2818 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 88% | 42,322 psi | 65% | 2756 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 43,265 psi | 66% | 2697 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,076 psi | 64% | 2674 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 50,937 psi | 78% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,364 psi | 62% | 2657 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,616 psi | 73% | 2825 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 55,042 psi | 84% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,398 psi | 73% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,292 psi | 63% | 2621 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,974 psi | 64% | 2749 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 46,543 psi | 71% | 2769 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,371 psi | 76% | 2805 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 35,766 psi | 55% | 2635 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,753 psi | 58% | 2621 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 53,069 psi | 81% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,200 psi | 82% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,541 psi | 68% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,553 psi | 62% | 2677 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 39,769 psi | 61% | 2661 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,663 psi | 79% | 2802 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,132 psi | 61% | 2677 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 31,169 psi | 48% | 2516 fps | 96.8% |
| Vihtavuori N560 | 53.8 gr | 94% | 49,806 psi | 76% | 2953 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,566 psi | 61% | 2638 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 41,524 psi | 64% | 2733 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,889 psi | 38% | 2405 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,438 psi | 65% | 2720 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 .25-06 Rem. loaded with the .257 | 117gr | Sierra SPT Pro-Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,140 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 (450 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 117.0 gr projectile in 0.257" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .25-06 Rem. with the .257 | 117gr | Sierra SPT Pro-Hunter 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.