presure sign?

[jdb]

My FIL just bought a m1 garand and shot it for the first time today. I was looking at his empty brass which is worthless to reload as the rims are all torn up from the extractor? and the primers look odd to me, the dent looks kinda like a splash? there is a ridge all the way around the dent? it really looked odd and he commented that he was haveing feeding troubles so I was wondering if he has pressure issues?

[Slider]

yes

[Huntbear]

Yes x2.  His chamber is either over sized a bit, or he is shooting hot handloads. 
Either way that is a recipe for disaster.

[Jamieb]

Garands are known for having excessive head space problems. The rifle should be checked out by a smith.