.22 Eargesplitten Loudenboomer

.22 Eargesplitten Loudenboomer
Type	Rifle
Place of origin	United States
Service history
Used by	dr.
Production history
Designer	P.O. Ackley
Designed	1960s
Specifications
Parent case	.378 Weatherby Magnum
Case type	Flask barrel
Bullet diameter	.224" - 5.56mm
Rim diameter	.579 in (14.7 mm)
Ballistic performance
Bullet mass/type Velocity Energy 50 gr (3 g) Machine gunpowder 106gr. 4,160 ft/s (1,270 m/s) 1,921 ft⋅lbf (2,605 J) 50 gr (3 g) H570 100gr. 4,170 ft/s (1,270 m/s) 1,930 ft⋅lbf (2,620 J) 50 gr (3 g) H570 102gr. 4,390 ft/s (1,340 m/s) 2,139 ft⋅lbf (2,900 J) 50 gr (3 g) H570 105gr. 4,600 ft/s (1,400 m/s) 2,349 ft⋅lbf (3,185 J)
Source(s): quoted "Guns and Ammo Magazine", B. Hutton

.22 Eargesplitten Loudenboomer is a wildcat rifle cartridge.

This humorously named cartridge was developed in the 1960s by P.O. Ackley for Bob Hutton of Guns & Ammo magazine, and was intended solely to exceed 5,000 ft/s (1,500 m/s) muzzle velocity. Ackley's loads only managed 4,600 ft/s (1,400 m/s)(Mach 4.2), firing a 50-grain (3.2 g) bullet. Based on a .378 Weatherby Magnum case, the case is impractically over-capacity for the bore diameter, and so the cartridge remains a curiosity. The advent of new slower-burning smokeless powders may have changed the equation.

See also

• List of rifle cartridges