Origin of self-loader
First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for self-loader
Pistol will then be fired deliberately 500 rounds as a self-loader, cooling after each 50 rounds.
After being hung up indoors for 22 hours, five shots will be fired into a sand butt, using pistol as a self-loader.
In both cases pistol should be used as a self-loader, and in the second the cartridge may be removed and wiped, then reloaded.