Hi guys, first post here and I'm hoping you may be able to help me out a little. I'm in the process of having a 243 AI built and I'm trying to gather some information for loads to try. I'm hoping to shoot either Berger 105's or 115's and I'm curious as to what powders are getting the best results since I've seen multitudes of load data posted on different sites. I've got Hodgdon 4350, 4831 and Retumbo sitting around now. If anyone has suggestions on a starting point with any of these or any other powder for that matter I'm all ears. Thanks!