Hello all i am just prepairing my .243 set up and was looking for a bit advice. I re sized my cases and just tried to set my seating die up. I measured a factory round that measured 2.626 overall length. I measured one from a friend that measures 2.695 so i tried adjusting my size to 2.640 as the hodgdon web site states (bearing in mind i get good groups with factory or my mates size & im not looking for bench rest results) anyway i tried to cycle these into my fifle and find them tight at the last point and on the down stroke of my bolt. the question is why?? ps i havent trimmed the case as i dont know what to trim it to ?thanks in advance for any replies