I understand primary extraction and how to correct for it, but im curious if theres a specific minimum number that needs to be hit for successful primary extraction? A number I've heard thrown out not to go below is .060. The reason im asking is I hace a Remington 700 with like .085 primary extraction and .045 cock on close and the corners of the lugs have been chamfered by previous owner. Im wondering if i can machine off .015 off the back of the lugs to help the cock on close and still have enough primary extraction? Yes i know reducing cock on close will shorten my F.P. fall but i already had plan to recut the ramp.