Two Letters Re: An M1A Rifle Goes Ka-boom!
Dear Jim, I don’t suspect a squib load as the problem for the M1A. A squib in a gas-operated semi-auto generally means no cycling of the bolt or ejection, which always indicates a problem. While there’s a link to an analysis that shows a flawed barrel, and I agree with it from the images shown, I also suspect an ammunition problem. Consider that from the image, the chamber split, and split fast. No bulge, no crack, just a boom. This indicates a substantial overpressure in the chamber. There are likely several things that can cause this. Two that come to …