My cousin's son had a ring bulge at the end of the chamber of the right barrel of his almost new, vintage Sears Laurona. He to was shooting cheap factory loads. I do not remember the exact manufacturer. but the only possibility I could come up with was a base wad separation. It is good that barrel held as he shoots left handed and it would have been right in front of his face. Sometimes we loose focus and don't think to glance into the bores when reloading. I wish the injured party well, and am trying very hard not to make snide comments about dangerous modern guns that are proofed etc. but I won't. Sorry it had to happen.