My neighbor bought a new m&p and took it out to shoot. He was shooting reloads and I 'think' he fired a round behind a squib. He's in Vegas and i haven't had a chance to get all the details. There is a case head in the barrel but the slide will not come back. The barrel won't pass through the slide and I'm wondering if it's bulged. It's been to a smith who said he couldn't do anything with it. I've kroiled it and pounded on it some but am afraid to get any more aggressive. Any suggestions?