Not sure how many folks struggle with finding jeans that are comfortable while carrying inside the waistband. I have to tell you, I have, to the point of giving up and sticking with an outside the waistband holster and covering up with a jacket or stuff it in my front pocket with an over sized...
Ok, I decided to trust my M1a with Springfield. Had a talk with one of their reps, I feel good that once I ship the gun, they will take care of it and I'll be able to get back to the range. I'll consider this post closed.
Sorry, I have no helpful answer. I too am having this issue, short stroking, jamming, it will not eject. Right now I would settle if someone knew of an expert gun smith in central Florida that works with M1As.