.458 HAM'R

The .458 HAM'R (11.6x39mmRB) is a large bore, centerfire rifle cartridge, designed for use in AR-15 style rifles. Wilson Combat, owned by Bill Wilson (developer of .458 HAM'R), sells a .458 HAM'R chambered, AR-style firearm named the WC-12, which is between the sizes of the AR-10 and AR-15 platforms. AR-10 platforms with lowers that accept an AR-15 cartridge can also safely fire the .458 HAM'R. ^[1][2][3]

.458 HAM'R
Place of origin	United States
Production history
Designer	Bill Wilson
Specifications
Case type	Rebated, bottlenecked
Bullet diameter	.458 in (11.6 mm)
Maximum pressure	46,000 psi
Ballistic performance
Bullet mass/type Velocity Energy 300 gr (19 g) 2,100 ft/s (640 m/s) 2,938 ft⋅lbf (3,983 J)
Test barrel length: 18

It is very similar to the .458 SOCOM, specialized to operate at higher pressure, offering an increased range in a flatter trajectory. The cartridge uses an AR-15 sized magazine, but the cartridge pressures require a bolt, barrel, and receiver designed for the pressure of the AR-10 platform. ^[1][2][3]

Designer

Bill Wilson of Wilson Combat designed the cartridge.^[1][3] The .458 HAM'R has a single sister cartridge under the HAM'R name, the .300 HAM'R, also designed by Wilson Combat.^[4]

See also

• List of rifle cartridges
• List of AR platform cartridges
• .458 SOCOM

References

1. Hoffman, Terrill (12 March 2018). "Review: Wilson Combat .458 HAM'R Ultimate Hunter". Shooting Illustrated. Fairfax, VA: National Rifle Association of America. Retrieved 13 September 2020.
2. Mann, Richard (17 September 2019). "The 30 Best AR-Style Rifles for Hunting and Personal Defense". Field & Stream. New York City: Bonnier Corporation. ISSN 0015-0673. Retrieved 13 September 2020.
3. Pinsky, Jay (17 March 2018). "Review: Wilson Combat .458 HAM'R Ultimate Hunter". American Hunter. Fairfax, VA: National Rifle Association of America. Retrieved 13 September 2020.
4. Burton, James (2018-08-29). "Wilson Combat Unleashes Another HAM'R - 300 HAM'R - AR Build Junkie". Retrieved 2024-02-04.