22-250 ultra question

[jb22-250]

I am new to this group,but I have had my 22-250 ultra varmint rifle for a while. I usually shoot 55 grain reloads but I bought a box of winchester white box 45 grain high velocity. I shot 3 shells and stopped because it was flattening the primers, and on the last shell it blew the primer out, I have not had a chance to shoot the rifle since with my reloads. The three shots I took still made a good group. Has anyone else had this problem or know if there is possibly a problem with my gun?

[quickdtoo]

Welcome to Graybeard Outdoors!! I'd check to see if the WWB rounds have too much head space, Ideally a loaded round will be flush to the chamber mouth when seated fully into the chamber past the ejector/extractor claw, it they're recessed any, either they're not sized properly or the chamber is oversize, or a little of both. You maybe should check the barrel fit to the frame with a feeler gauge, instructions are in the FAQ and Help sticky under barrel fitting.

Tim