Load Specifications
Load data in caliber .25-06 Ackley Improved with .257 | 117gr | Rhino Solid Shank bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Ramshot Grand, Accurate MAGPRO and Accurate High Country.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 57,595 psi | 88% | 3005 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 58,958 psi | 90% | 3045 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,201 psi | 85% | 3094 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 94% | 56,217 psi | 86% | 3097 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 56,246 psi | 86% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,072 psi | 86% | 3041 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 57,696 psi | 88% | 3107 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,225 psi | 74% | 2927 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,989 psi | 66% | 2884 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,275 psi | 86% | 3041 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,435 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,854 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,261 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,579 psi | 85% | 3031 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,580 psi | 88% | 3100 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 58,726 psi | 90% | 3071 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,085 psi | 83% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,259 psi | 85% | 3104 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,405 psi | 86% | 3081 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 58,813 psi | 90% | 2995 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,314 psi | 77% | 3002 fps | 97.8% |
| Bofors RP5 | <<locked>> | 96% | 57,580 psi | 88% | 3100 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 57,522 psi | 88% | 2992 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,330 psi | 82% | 3025 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 82% | 58,972 psi | 90% | 3018 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 56,956 psi | 87% | 3045 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,782 psi | 85% | 2999 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 57,522 psi | 88% | 3041 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,246 psi | 86% | 3022 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,420 psi | 86% | 2969 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,069 psi | 81% | 3136 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 57,566 psi | 88% | 3081 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 57% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,550 psi | 85% | 2972 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,608 psi | 85% | 2963 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 55,593 psi | 85% | 2982 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 58,508 psi | 90% | 3025 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 55,376 psi | 85% | 3081 fps | 98.3% |
| Lovex S065 | <<locked>> | 86% | 56,260 psi | 86% | 2959 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 58,030 psi | 89% | 3009 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,071 psi | 84% | 2969 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,753 psi | 87% | 3031 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 38,406 psi | 59% | 2799 fps | 96.5% |
| Norma MRP | <<locked>> | 94% | 57,450 psi | 88% | 3123 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 57,421 psi | 88% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,159 psi | 86% | 3100 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 56,159 psi | 86% | 3031 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 58,900 psi | 90% | 3097 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 58% | 1949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 58,508 psi | 90% | 3002 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,666 psi | 87% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,114 psi | 84% | 3012 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,305 psi | 88% | 3097 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,838 psi | 82% | 3130 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 58,943 psi | 90% | 2992 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,261 psi | 88% | 3012 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 58,856 psi | 90% | 3081 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 57,522 psi | 88% | 2992 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,260 psi | 86% | 2959 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 58,030 psi | 89% | 3009 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,869 psi | 87% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 58,755 psi | 90% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,405 psi | 85% | 2910 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 58,421 psi | 90% | 3074 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 58,668 psi | 90% | 2989 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,448 psi | 85% | 2946 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 57,783 psi | 89% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,564 psi | 85% | 2992 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 56,188 psi | 86% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 59,045 psi | 90% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 59,030 psi | 90% | 3025 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 58,320 psi | 89% | 3025 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,217 psi | 88% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,203 psi | 88% | 3114 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,913 psi | 87% | 3087 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 58,842 psi | 90% | 2972 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,956 psi | 87% | 3045 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,391 psi | 86% | 3153 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,492 psi | 85% | 2986 fps | 99% |
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 3100 | <<locked>> | 80% | 33,344 psi | 51% | 2543 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 44,773 psi | 69% | 2815 fps | 99.8% |
| Accurate High Country | 54.9 gr | 86% | 44,759 psi | 69% | 2900 fps | 95.9% |
| Accurate MAGPRO | 58.5 gr | 90% | 48,733 psi | 75% | 2963 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 52,823 psi | 81% | 2900 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,089 psi | 61% | 2740 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 43,772 psi | 67% | 2844 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 96% | 42,192 psi | 65% | 2799 fps | 95% |
| ADI AR 2225 | <<locked>> | 94% | 35,273 psi | 54% | 2690 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,524 psi | 62% | 2740 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,940 psi | 83% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,018 psi | 66% | 2825 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,559 psi | 76% | 2946 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,132 psi | 61% | 2733 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,116 psi | 58% | 2726 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,068 psi | 49% | 2575 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,879 psi | 49% | 2592 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,954 psi | 54% | 2707 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 40,669 psi | 62% | 2782 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 55,143 psi | 84% | 2943 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 40,785 psi | 62% | 2812 fps | 95.1% |
| Bofors RP5 | <<locked>> | 84% | 38,116 psi | 58% | 2726 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 47,601 psi | 73% | 2818 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 92% | 40,306 psi | 62% | 2762 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 55,071 psi | 84% | 2959 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 46,528 psi | 71% | 2864 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 49,168 psi | 75% | 2884 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 46,949 psi | 72% | 2858 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,934 psi | 70% | 2838 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,408 psi | 62% | 2703 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,058 psi | 58% | 2802 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 46,195 psi | 71% | 2887 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 42% | 1706 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,250 psi | 66% | 2749 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,168 psi | 75% | 2851 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 42,685 psi | 65% | 2759 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,368 psi | 70% | 2792 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 45,034 psi | 69% | 2884 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 46,688 psi | 72% | 2799 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 44,933 psi | 69% | 2785 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 32,808 psi | 50% | 2526 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 43,047 psi | 66% | 2779 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 35,926 psi | 55% | 2733 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 34,896 psi | 53% | 2674 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 44,019 psi | 67% | 2805 fps | 99.7% |
| Ramshot Grand | 55.7 gr | 88% | 41,872 psi | 64% | 2828 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 42,859 psi | 66% | 2792 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 37,376 psi | 57% | 2700 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 43% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,708 psi | 84% | 2946 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,649 psi | 81% | 2992 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,860 psi | 69% | 2835 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,960 psi | 66% | 2848 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,795 psi | 53% | 2707 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 51,822 psi | 79% | 2890 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,338 psi | 68% | 2779 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 39,349 psi | 60% | 2717 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 47,601 psi | 73% | 2818 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,688 psi | 72% | 2799 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,933 psi | 69% | 2785 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,113 psi | 81% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,996 psi | 80% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,527 psi | 70% | 2740 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,001 psi | 60% | 2713 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,735 psi | 79% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,136 psi | 69% | 2762 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 41,017 psi | 63% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,420 psi | 57% | 2644 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 49,472 psi | 76% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,382 psi | 70% | 2799 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,970 psi | 57% | 2625 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 44,889 psi | 69% | 2802 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,998 psi | 55% | 2654 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 46,485 psi | 71% | 2920 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 92% | 43,279 psi | 66% | 2838 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,715 psi | 69% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,746 psi | 72% | 2867 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,427 psi | 44% | 2572 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,262 psi | 60% | 2684 fps | 95.3% |
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 79 powders for .25-06 Ackley Improved loaded with the .257 | 117gr | Rhino Solid Shank. Winchester StaBALL HD delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,153 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (450 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 117.0 gr projectile in 0.257" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Ramshot Grand, Accurate MAGPRO, Accurate High Country rank at the top here: for .25-06 Ackley Improved with the .257 | 117gr | Rhino Solid Shank 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.