Eargesplitten Loudenboomer

.22 Eargesplitten Loudenboomer
The Loudenboomer from P.O. Ackley's Handbook for Shooters and Reloaders, Vol. 2.
Type	rifle cartridge
Country of Origin	USA
Specifications
Parent Case	.378 Weatherby Magnum
Case Type	Flask barrel
Bullet Ø	.224" - 5.69mm
Neck Ø	?
Base Ø	?
Rim Ø	?
Case Length	?
Full Length	?
Production & Service
Designer	P.O. Ackley
Design Date	1960s
Ballistic Performance Sampling
Bullet Wt./type Velocity Energy 50 gr (3.2 g) Machine gun powder 106gr. 4,160 ft/s (1,270 m/s) 1,921 ft·lbf (2,605 J) 50 gr (3.2 g) H570 100gr. 4,170 ft/s (1,270 m/s) 1,930 ft·lbf (2,620 J) 50 gr (3.2 g) H570 102gr. 4,390 ft/s (1,340 m/s) 2,139 ft·lbf (2,900 J) 50 gr (3.2 g) H570 105gr. 4,600 ft/s (1,400 m/s) 2,349 ft·lbf (3,185 J) Source: quoted "Guns and Ammo Magazine", B. Hutton

The .22 Eargesplitten Loudenboomer is a wildcat rifle cartridge based on the .378 Weatherby Magnum cartridge case, necked down to .224 calibre with a sharp-cornered 40° shoulder.

This whimsically named little noisemaker was cooked up in the 1960s by P.O. Ackley for Bob Hutton of Guns and Ammo magazine's technical department. They were hoping to set a world record for firing .22 caliber bullets at a muzzle velocity of over 5000 fps (1524 m/s).

The round failed to reach the desired velocity, topping out at 4,600 fps. It also had a bit of a problem with spinning bullets so fast they would fly apart before reaching the target.

Other names

• .22 Holy Thundering Shit
• .22 Blowupyergun
• .22 WTF Were You Thinking
• Kaboominfacen Splittenbarrel Gunaruind

See also

• List of rifle cartridges

The Loudenboomer compared to a 30-06