Julian Sommerville Hatcher (June 26, 1888 – December 4, 1963), was a U.S.
Army major general, noted firearms expert and author of the early twentieth century.
He is credited with several technical books and articles relating to military firearms, ballistics, and autoloading weapons.
His premier works are Hatcher's Notebook and Book of the Garand, along with Pistols and Revolvers and Their Uses and Textbook of Pistols and Revolvers.
In the latter work he introduced the Hatcher Scale, probably the first attempt to determine the stopping power of a handgun round by a formula.
He was also a pioneer in the forensic identification of firearms and their ammunition.
Hatcher retired from the United States Army as a Major General.
Afterward, he served as Technical Editor of the National Rifle Association's American Rifleman magazine.
Hatcher was born in Hayfield, Virginia and graduated with honors from Annapolis in 1909 [he voluntarily transferred from the Navy to the Army's coast artillery].
He married Eleanor Dashiell and together, they had three children.
His solution to the "grenading" of receivers when shell cases failed catastrophically was to drill a gas vent hole in the left side of the receiver adjacent to the breech.
This hole would allow gases escaping from a ruptured case to be exhausted safely and away from the face of the shooter.
Dubbed the "Hatcher Hole", the modification was typically added to receivers at overhaul.