Load data for 5.56 x 45 NATO + 77gr Sierra HPBT MatchKing
446 suitable loads across 80 powder(s) for cartridge 5.56 x 45 NATO with 77gr Sierra HPBT MatchKing bullet.
The most recommended powders for this combination are Alliant Power Pro 1200-R, Hodgdon VARGET and ADI AR 2219.
Based on NATO EPVAT, the max. allowed case length is 1.760 in / 44.70 mm, the max. cartridge length is 2.260 in / 57.40 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Based on NATO EPVAT, the max. allowed case length is 1.760 in / 44.70 mm, the max. cartridge length is 2.260 in / 57.40 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Load Specifications
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Community Loads for 5.56 x 45 NATO + 77gr Sierra HPBT MatchKing
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) |
|---|---|---|---|---|---|
| 24.0 gr | 2.260" | 16.0" | 2592 fps | ••• | |
| 25.2 gr | 2.260" | 16.0" | 2487 fps | ••• | |
| 25.4 gr | 2.260" | 18.0" | 2822 fps | ••• | |
| ••• | 2.260" | 16.0" | 2566 fps | ••• | |
| ••• | 2.260" | 16.0" | 2621 fps | ••• | |
| ••• | 2.226" | 16.0" | 2644 fps | ••• | |
| ••• | 2.250" | 16.0" | 2631 fps | ••• | |
| ••• | 2.240" | 20.0" | 2507 fps | ••• | |
| ••• | 2.260" | 16.0" | 2392 fps | ••• | |
| ••• | 2.240" | 20.0" | 2756 fps | ••• | |
| ••• | 2.260" | 20.0" | 2667 fps | ••• | |
| ••• | 2.260" | 16.0" | 2500 fps | ••• | |
| ••• | 2.260" | 16.0" | 2592 fps | ••• | |
| ••• | 2.260" | 16.0" | 2615 fps | ••• | |
| ••• | 2.226" | 20.0" | 2543 fps | ••• | |
| ••• | 2.226" | 16.0" | 2569 fps | ••• | |
| ••• | 2.260" | 20.0" | 2700 fps | ••• | |
| ••• | 2.260" | 16.0" | 2608 fps | ••• | |
| ••• | 2.260" | 18.0" | 2694 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.