It's a very high quality clone of an HK G3 semi auto .308 rifle.
Myself, when I shoot my PTR, it is usually about 60 rounds or so, with a scope from prone at clay pigeons or other similar targets out to about 400 yards or so. It really is a whole lot of fun.
CETME & G3 actions are really tough on brass... they basically beat the crap outta the empties.