Sorry, my mistake. Not re-heated. Instead, the Marines had the Hatcher holes drilled into the receivers of their guns "to cut the incidence of burst receivers".
General Julian Hatcher, then a young ordnance officer suggested drilling a hole in the left side of the receiver as a gas relief port to cut the incidence of burst receivers. While this was generally ignored by the Army, the Marine Corps took the suggestion to heart and many of the Marine Corps low numbered '03s of the era will be found with the so called "Hatcher Hole" in the left side of the receiver. After W.W.I, the Marines solved the "low number gun problem" by rebarreling them when sent back for refit, drilling the Hatcher Hole and reissuing them with instructions that they were not to be used for firing rifle grenades. The high numbered guns are extremely strong and never experienced any problems.
