.458 HAM'R

US large bore rifle cartridge

.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

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]

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]

References

^ ^a ^b ^c 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.
^ ^a ^b 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.
^ ^a ^b ^c 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.
^ Burton, James (2018-08-29). "Wilson Combat Unleashes Another HAM'R - 300 HAM'R - AR Build Junkie". Retrieved 2024-02-04.

Rebated rim (RB) cartridges

Pistol / carbine / PDW

.41 AE • .429 DE • .440 Cor-Bon • .50 AE • .50 GI • FN 5.7x28mm • HK 4.6×30mm

Rifle (intermediate & fully powered)

.350 Legend • .375 SOCOM • .375 Swiss P • .400 Legend • .416 Hushpuppy • .425 Westley Richards • .45 Raptor • .450 Bushmaster • .458 HAM'R • .458 SOCOM • .45-70 Auto • .499 Leitner-Wise • .50 Beowulf • .50 Krater • .500 Jeffery • .502 Thunder Sabre • .505/.404 Stewart • .510 Beck • .585 Nyati • .600 Overkill • Nosler cartridges (22 • 26 • 27 • 28 • 30 • 33) • Remington Short Action Ultra Magnum (7mm • .300) • Winchester Short Magnum (.270 • 7mm • .300 • .325) • Winchester Super Short Magnum (.223 • .243 • .25)

Autocannon (20mm+)

20x70mmRB • 20x72mmRB • 20×80mmRB • 20×101mmRB • 20×110mmRB • 20×128mmRB • 30×90mmRB • 30×92mmRB • 55×175mmRB