Load data for .22-250 Ackley Improved + 55gr Sierra SBT GameKing
Based on Wildcat, the max. allowed case length is 1.908 in / 48.46 mm, the max. cartridge length is 2.350 in / 59.69 mm, and the max. allowed pressure is 57,986 PSI / 3,998 bar.
Based on Wildcat, the max. allowed case length is 1.908 in / 48.46 mm, the max. cartridge length is 2.350 in / 59.69 mm, and the max. allowed pressure is 57,986 PSI / 3,998 bar.
Load Specifications
ImperialMetric
Bullet:.224 | 55gr | SBT GameKing
Cartridge:.22-250 Ackley Improved load data
Case Length (L3):1.940" | 49.3 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.160" | 4.1 mm
Case Capacity:46.9 gow | 3.04 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (Wildcat):57,986 psi | 3,998 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:12.0
Get PRO license to unlock all data and calculators
Community Loads for .22-250 Ackley Improved + 55gr Sierra SBT GameKing
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 36.8 gr | 2.500" | 24.0" | 3108 fps | ••• | |
| 38.2 gr | 2.500" | 24.0" | 3232 fps | ••• | |
| 39.6 gr | 2.500" | 24.0" | 3355 fps | ••• | |
| ••• | 2.500" | 24.0" | 3479 fps | ••• | |
| ••• | 2.500" | 24.0" | 3610 fps | ••• | |
| ••• | 2.500" | 24.0" | 3352 fps | ••• | |
| ••• | 2.500" | 24.0" | 3504 fps | ••• | |
| ••• | 2.500" | 24.0" | 3638 fps | ••• | |
| ••• | 2.500" | 24.0" | 3741 fps | ••• | |
| ••• | 2.500" | 24.0" | 3224 fps | ••• | |
| ••• | 2.500" | 24.0" | 3322 fps | ••• | |
| ••• | 2.500" | 24.0" | 3422 fps | ••• | |
| ••• | 2.500" | 24.0" | 3510 fps | ••• | |
| ••• | 2.500" | 24.0" | 3609 fps | ••• | |
| ••• | 2.500" | 24.0" | 3341 fps | ••• | |
| ••• | 2.500" | 24.0" | 3463 fps | ••• | |
| ••• | 2.500" | 24.0" | 3586 fps | ••• | |
| ••• | 2.500" | 24.0" | 3703 fps | ••• | |
| ••• | 2.500" | 24.0" | 3264 fps | ••• | |
| ••• | 2.500" | 24.0" | 3372 fps | ••• | |
| ••• | 2.500" | 24.0" | 3485 fps | ••• | |
| ••• | 2.500" | 24.0" | 3578 fps | ••• | |
| ••• | 2.500" | 24.0" | 3220 fps | ••• | |
| ••• | 2.500" | 24.0" | 3328 fps | ••• | |
| ••• | 2.500" | 24.0" | 3454 fps | ••• | |
| ••• | 2.500" | 24.0" | 3568 fps | ••• | |
| ••• | 2.500" | 24.0" | 3175 fps | ••• | |
| ••• | 2.500" | 24.0" | 3275 fps | ••• | |
| ••• | 2.500" | 24.0" | 3383 fps | ••• | |
| ••• | 2.500" | 24.0" | 3507 fps | ••• | |
| ••• | 2.500" | 24.0" | 3447 fps | ••• | |
| ••• | 2.500" | 24.0" | 3313 fps | ••• | |
| ••• | 2.500" | 24.0" | 3425 fps | ••• | |
| ••• | 2.500" | 24.0" | 3537 fps | ••• | |
| ••• | 2.500" | 24.0" | 3204 fps | ••• | |
| ••• | 2.500" | 24.0" | 3303 fps | ••• | |
| ••• | 2.500" | 24.0" | 3400 fps | ••• | |
| ••• | 2.500" | 24.0" | 3504 fps | ••• | |
| ••• | 2.500" | 24.0" | 3034 fps | ••• | |
| ••• | 2.500" | 24.0" | 3137 fps | ••• | |
| ••• | 2.500" | 24.0" | 3243 fps | ••• | |
| ••• | 2.500" | 24.0" | 3347 fps | ••• | |
| ••• | 2.500" | 24.0" | 3449 fps | ••• | |
| ••• | 2.500" | 24.0" | 3555 fps | ••• | |
| ••• | 2.500" | 24.0" | 3144 fps | ••• | |
| ••• | 2.500" | 24.0" | 3248 fps | ••• | |
| ••• | 2.500" | 24.0" | 3355 fps | ••• | |
| ••• | 2.500" | 24.0" | 3466 fps | ••• | |
| ••• | 2.500" | 24.0" | 3579 fps | ••• | |
| ••• | 2.500" | 24.0" | 3462 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.