Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:100 gr
Bullet Diameter:0.257"
Bullet Length:<<locked>>
Caliber:.25-06 Ackley Improved load data
Case Length (l3):2.494"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:71 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,267 psi
Recommended Twist Rate:1:9.0
Load data in caliber .25-06 Ackley Improved with .257 | 100gr | Nosler Expansion Tip bullet and 102 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-26 and Hodgdon Superformance.
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% | 58,363 psi | 89% | 3107 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,594 psi | 87% | 3127 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,969 psi | 84% | 3163 fps | 99.4% |
| Accurate 4064 | <<locked>> | 86% | 58,958 psi | 90% | 3166 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,797 psi | 87% | 3225 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 56,362 psi | 86% | 3314 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 82% | 57,957 psi | 89% | 3202 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,811 psi | 86% | 3153 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 58,363 psi | 89% | 3274 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,811 psi | 86% | 3258 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,259 psi | 85% | 3278 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 58,378 psi | 89% | 3268 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 58,378 psi | 89% | 3268 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,681 psi | 87% | 3179 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,724 psi | 87% | 3199 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,638 psi | 88% | 3291 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,434 psi | 85% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,508 psi | 88% | 3255 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,795 psi | 84% | 3251 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,750 psi | 79% | 3182 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,947 psi | 69% | 3091 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,115 psi | 86% | 3330 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 58,276 psi | 89% | 3219 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,053 psi | 77% | 3159 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 57,638 psi | 88% | 3192 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,795 psi | 84% | 3251 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 56,869 psi | 87% | 3173 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 57,957 psi | 89% | 3209 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 55,361 psi | 85% | 3219 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 58,784 psi | 90% | 3241 fps | 98.4% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 58,697 psi | 90% | 3245 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 82% | 58,610 psi | 90% | 3212 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,972 psi | 89% | 3202 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,579 psi | 85% | 3192 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,898 psi | 86% | 3251 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,230 psi | 56% | 2031 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,999 psi | 86% | 3156 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 58,769 psi | 90% | 3189 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,899 psi | 89% | 3169 fps | 99.1% |
| IMR 4350 | <<locked>> | 94% | 58,262 psi | 89% | 3205 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 58,552 psi | 90% | 3202 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 57,203 psi | 88% | 3212 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 58,247 psi | 89% | 3228 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,580 psi | 88% | 3192 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 82% | 58,581 psi | 90% | 3169 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,666 psi | 87% | 3123 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 58,798 psi | 90% | 3179 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 58,682 psi | 90% | 3196 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 56,550 psi | 87% | 3186 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,165 psi | 69% | 2989 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 56,289 psi | 86% | 3136 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,261 psi | 88% | 3136 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,014 psi | 86% | 3182 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,550 psi | 85% | 3199 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 58,827 psi | 90% | 3350 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 55,492 psi | 85% | 3209 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 57,276 psi | 88% | 3212 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,824 psi | 82% | 3241 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 58,233 psi | 89% | 3264 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,979 psi | 74% | 3097 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,883 psi | 57% | 2080 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 58,073 psi | 89% | 3192 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 58,044 psi | 89% | 3274 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 58,972 psi | 90% | 3310 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,884 psi | 87% | 3245 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,637 psi | 85% | 3278 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,005 psi | 67% | 3104 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 84% | 57,116 psi | 88% | 3140 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,464 psi | 88% | 3182 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,101 psi | 86% | 3179 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 56,536 psi | 87% | 3238 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 56,869 psi | 87% | 3173 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 58,682 psi | 90% | 3196 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 58,581 psi | 90% | 3169 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 58,798 psi | 90% | 3179 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,550 psi | 87% | 3186 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,840 psi | 86% | 3196 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,507 psi | 87% | 3169 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,101 psi | 87% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,392 psi | 89% | 3068 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 58,610 psi | 90% | 3146 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,057 psi | 86% | 3232 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 56,797 psi | 87% | 3061 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,276 psi | 88% | 3179 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,030 psi | 89% | 3166 fps | 96.2% |
| Somchem S365 | <<locked>> | 96% | 59,016 psi | 90% | 3268 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,232 psi | 88% | 3209 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 82% | 57,682 psi | 88% | 3048 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,667 psi | 88% | 3097 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 58,189 psi | 89% | 3114 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 59,059 psi | 90% | 3156 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,725 psi | 88% | 3205 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,084 psi | 81% | 3123 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 56,275 psi | 86% | 3104 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,855 psi | 87% | 3205 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,725 psi | 88% | 3268 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 58,958 psi | 90% | 3337 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,914 psi | 89% | 3166 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,695 psi | 85% | 3225 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,007 psi | 72% | 3235 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,898 psi | 87% | 3176 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,740 psi | 88% | 3205 fps | 98% |
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% | 51,169 psi | 78% | 3002 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,385 psi | 76% | 3002 fps | 97.1% |
| Accurate 3100 | <<locked>> | 90% | 38,435 psi | 59% | 2844 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 48,472 psi | 74% | 3005 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,898 psi | 57% | 2835 fps | 97.1% |
| Accurate High Country | <<locked>> | 94% | 48,733 psi | 75% | 3169 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 54,288 psi | 83% | 3143 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,064 psi | 71% | 2979 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 47,500 psi | 73% | 3077 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 98% | 52,069 psi | 80% | 3186 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,271 psi | 79% | 3209 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,645 psi | 73% | 3074 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,645 psi | 73% | 3074 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,456 psi | 71% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,763 psi | 76% | 3081 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,230 psi | 56% | 2854 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,133 psi | 63% | 2992 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,050 psi | 72% | 3064 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,469 psi | 68% | 3051 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,992 psi | 43% | 2621 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,709 psi | 56% | 2890 fps | 96% |
| Alliant Reloder-26 | 55.4 gr | 86% | 35,302 psi | 54% | 2894 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,346 psi | 83% | 3156 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 46,688 psi | 72% | 3094 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 46,717 psi | 72% | 3012 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,469 psi | 68% | 3051 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 41,075 psi | 63% | 2864 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 47,137 psi | 72% | 3018 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 39,262 psi | 60% | 2894 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 44,976 psi | 69% | 2986 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,737 psi | 84% | 3179 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 54,911 psi | 84% | 3156 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,504 psi | 51% | 2733 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,735 psi | 79% | 3130 fps | 100% |
| Hodgdon Superformance | 54.4 gr | 82% | 41,191 psi | 63% | 2966 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 41% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,417 psi | 80% | 3097 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,443 psi | 74% | 3018 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,879 psi | 78% | 3048 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 42,003 psi | 64% | 2900 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,583 psi | 65% | 2900 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 35,578 psi | 55% | 2785 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 51,039 psi | 78% | 3110 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,954 psi | 83% | 3130 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 80% | 54,810 psi | 84% | 3117 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,142 psi | 81% | 3068 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,544 psi | 74% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,059 psi | 61% | 2844 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 40,915 psi | 63% | 2881 fps | 95.8% |
| Lovex S071 | <<locked>> | 94% | 36,869 psi | 56% | 2805 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 52,997 psi | 81% | 3084 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,606 psi | 82% | 3081 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,081 psi | 75% | 3064 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 48,196 psi | 74% | 3068 fps | 95.8% |
| Norma MRP | <<locked>> | 90% | 40,654 psi | 62% | 2995 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 36,898 psi | 57% | 2835 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 49,632 psi | 76% | 3084 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,748 psi | 76% | 3166 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 82% | 38,464 psi | 59% | 2881 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 44,324 psi | 68% | 3022 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 42% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,268 psi | 72% | 3002 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 54,172 psi | 83% | 3212 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,801 psi | 67% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,883 psi | 57% | 2851 fps | 96.7% |
| ReloadSwiss RS 70 | 51 gr | 80% | 35,882 psi | 55% | 2854 fps | 95.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,828 psi | 63% | 3022 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 50,343 psi | 77% | 3031 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,990 psi | 67% | 2953 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 52,475 psi | 80% | 3117 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 92% | 46,137 psi | 71% | 3045 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,075 psi | 63% | 2864 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,059 psi | 61% | 2844 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,810 psi | 84% | 3117 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,544 psi | 74% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,915 psi | 63% | 2881 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,469 psi | 70% | 3012 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,982 psi | 81% | 3110 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,708 psi | 82% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,382 psi | 70% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,160 psi | 60% | 2782 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,716 psi | 70% | 3038 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 53,577 psi | 82% | 3012 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,382 psi | 68% | 2956 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 54,418 psi | 83% | 3107 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 33,199 psi | 51% | 2782 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 43,671 psi | 67% | 2963 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 54,302 psi | 83% | 2999 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,589 psi | 78% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,010 psi | 78% | 3009 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,380 psi | 65% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,290 psi | 59% | 2838 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 94% | 43,149 psi | 66% | 2933 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 49,182 psi | 75% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,681 psi | 58% | 2831 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 30,908 psi | 47% | 2707 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 98% | 54,708 psi | 84% | 3264 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,579 psi | 58% | 2805 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 39,262 psi | 60% | 2894 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,456 psi | 44% | 2720 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,997 psi | 81% | 3117 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,630 psi | 71% | 3009 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 102 powders for .25-06 Ackley Improved loaded with the .257 | 100gr | Nosler Expansion Tip. Norma MRP delivers the highest muzzle velocity at 3,350 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,350 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 100.0 gr projectile in 0.257" calls for a 1:9.0 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .25-06 Ackley Improved with the .257 | 100gr | Nosler Expansion Tip 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.