Seems like the commercial FN action I used which was originally chambered to the .270 Win. took some way too heavy reloads from the guy I bought it from. PJ
So the problem was finally diagnosed. Lug set-back?
"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown