there was a thread a while ago about a burst FR-7 sold on GB. Apparently the cause was a handload that the shooter used. Never trust one that you didn't do yourself.
http://www.surplusrifleforum.com/vie...1787&hilit=fr7
The action is a '93 mauser action. Same as a 1916 civil guard. The rifle should be just fine, but I was just saying that it was designed for a lighter charge load than a .308 WIN.