Load data for .280 Ackley Improved + 160gr Sierra GameKing
545 suitable loads across 93 powder(s) for cartridge .280 Ackley Improved with 160gr Sierra GameKing bullet.
The most recommended powders for this combination are Alliant Reloder-26, ReloadSwiss RS 70 and Hodgdon Superformance.
Based on SAAMI, the max. allowed case length is 2.525 in / 64.14 mm, the max. cartridge length is 3.330 in / 84.58 mm, and the max. allowed pressure is 65,000 PSI / 4,482 bar.

Based on SAAMI, the max. allowed case length is 2.525 in / 64.14 mm, the max. cartridge length is 3.330 in / 84.58 mm, and the max. allowed pressure is 65,000 PSI / 4,482 bar.

Load Specifications
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Community Loads for .280 Ackley Improved + 160gr Sierra 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) |
|---|---|---|---|---|---|
| 49.7 gr | 3.330" | 26.0" | 2609 fps | ••• | |
| 51.4 gr | 3.330" | 26.0" | 2686 fps | ••• | |
| 53.1 gr | 3.330" | 26.0" | 2760 fps | ••• | |
| ••• | 3.330" | 26.0" | 2446 fps | ••• | |
| ••• | 3.330" | 26.0" | 2550 fps | ••• | |
| ••• | 3.330" | 26.0" | 2654 fps | ••• | |
| ••• | 3.330" | 26.0" | 2757 fps | ••• | |
| ••• | 3.330" | 26.0" | 2809 fps | ••• | |
| ••• | 3.330" | 26.0" | 2861 fps | ••• | |
| ••• | 3.330" | 26.0" | 2903 fps | ••• | |
| ••• | 3.330" | 26.0" | 2463 fps | ••• | |
| ••• | 3.330" | 26.0" | 2553 fps | ••• | |
| ••• | 3.330" | 26.0" | 2643 fps | ••• | |
| ••• | 3.330" | 26.0" | 2688 fps | ••• | |
| ••• | 3.330" | 26.0" | 2733 fps | ••• | |
| ••• | 3.330" | 26.0" | 2575 fps | ••• | |
| ••• | 3.330" | 26.0" | 2651 fps | ••• | |
| ••• | 3.330" | 26.0" | 2691 fps | ••• | |
| ••• | 3.330" | 26.0" | 2592 fps | ••• | |
| ••• | 3.330" | 26.0" | 2669 fps | ••• | |
| ••• | 3.330" | 26.0" | 2746 fps | ••• | |
| ••• | 3.330" | 26.0" | 2783 fps | ••• | |
| ••• | 3.330" | 26.0" | 2331 fps | ••• | |
| ••• | 3.330" | 26.0" | 2423 fps | ••• | |
| ••• | 3.330" | 26.0" | 2517 fps | ••• | |
| ••• | 3.330" | 26.0" | 2612 fps | ••• | |
| ••• | 3.330" | 26.0" | 2329 fps | ••• | |
| ••• | 3.330" | 26.0" | 2439 fps | ••• | |
| ••• | 3.330" | 26.0" | 2547 fps | ••• | |
| ••• | 3.330" | 26.0" | 2655 fps | ••• | |
| ••• | 3.330" | 26.0" | 2479 fps | ••• | |
| ••• | 3.330" | 26.0" | 2551 fps | ••• | |
| ••• | 3.330" | 26.0" | 2623 fps | ••• | |
| ••• | 3.330" | 26.0" | 2658 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.