I had a 2a back when they were common here. I never could resize the brass, so I sold it to a buddy who had no interest in handloading .7.62 nato and 308 win have slightly different case dimensions. 308 win has higher pressures as well.
The chamber is cut to be sloppy on the 7.62 nato. It is a military chambers meant to work in the worst of conditions.
I have a 2a sporterized by gibbs. If i shoot 308 win factory ammo or hot handloads in it the brass swells tremendously and causes very difficult extraction. 7.62 nato gives no problems.
Brass fired through this gun is an absolute whore to run through a full lenght resizer also. I once measured the expansion of the brass but I cant remember what it was.
so since the chambers vary greatly on these guns it is possible to get one that will fire 308 win without any problems. Or you can get one lik emine that just plain wont work with 308 win.