Common problem...

by Paul , Wednesday, April 20, 2016, 17:00 (3142 days ago) @ steve k

With the code pointing to your email inbox, the system lets you see what you posted as you've got permission to see what's in there. But no one else can since it's in your email inbox. I just replaced the code with code that points to the picture on the server that hosts the forum. It should appear now for everyone. I took the liberty of trimming it down a bit so that it'd fit and so that the damage could be seen more clearly.

Those pics make me wonder if the blown section is always at the same orientation. That is, does it always blow out at, say, 3 o'clock in the chamber? Or does it blow at random spots around the chamber? If it's always at the same place, it would seem to indicate a low spot on the bolt face, perhaps.

I'd suggest you switch to CCI primers. They tend to be a bit harder. Shucks, they even have some "military grade" primers that are harder still for use in automatic rifles. We'll see what others more knowledgeable than myself have to say.