Second time this has happened now. Once with my .243, once with my shiny new .300 mag. The primer seems to have blown out a small pinhole right on its edge. I'm not loading hot, and the only similarity between the two instances is that I was using the same Winchester WLR primers in both loads. The primers rupturing is bad enough, but what's worse is that both of my rifles now have a little dent in the bolt face! Is this OK, or do I have to FSU down at Winchester?