I have an I.A.I. copy of the M1 carbine, purchased from a friend some years back. On my first trip to the range it doubled, then tripled on several shots. Oops! Disassembly and examination of the bolt revealed the firing pin jammed in the forward position, caused by a burr in the bolt firing pin hole......possibly factory.....causing the problem.
I need to run a reamer through in order to correct the problem but can't find any drawings on the internet and my government manual gives no information. Does anyone know the correct diameter of the hole in the bolt face? Thanks for any info in advance!