I have some assorted 9mm brass with Hornady 115gr FMJ that I'm reloading. The spec is for a OAL of 1.125 and I'm +/- .004" on that number using Lee dies and a Lee turret press. Question 1, Is +/- .004" ok? This is just plinking ammo Questino 2, Why does the OAL very like this? I was at BP today and was comparing the Lee dies the RCBS ones. The Lee had a big concave compared to the much shallower RCBS one. A guy at work is trying to convince me that I'm wasting my time with the Lee dies and should buy some RCBS ones.