Data last updated on 2020-02-17 @ 20:43:59pm (EST)

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Find In Stock  .458 HAMR Ammo From Top Retailers

The 458 HAMR case is longer than the 458 SOCOM case. During normal chambering the HAMR will not fit in a 458 SOCOM rifle. If you tried to chamber the same HAMR cartridge repeatedly in a .458 SOCOM, the case shoulder could potentially set back the .040 that would allow chambering, thereby creating an overpressure situation that would most likely damage your .458 SOCOM rifle and potentially cause injury.

The .458 HAM'R is a .458 SOCOM based caliber that was designed by Bill Wilson to push a 300 grain projectile 200fps faster than the SOCOM. Due to limitations of the bolt and extension of the AR-15, the .458 HAM'R is chambered in a hybrid AR platform that utilizes a larger diameter bolt and extension.

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