Hello everyone, I finally shot my 458 socom for the first time the other day and had a few minor issues to discuss. The first was a minor feed issue from using a bone stock pmag, which I will mod before trying again, but the big question I have is about loads. I ran 10 rounds of IMR4198 at 35 grns with a hornady ftx 325 grn bullet at the crimp groove, 2.015 coal if I remember correctly. This was from a load list found online, can't remember from who ATM, will look later. The max load was 36.6 grn I think. So these loads will cycle the action just barely, getting about 50/50 on bolt lock back. Another sight stated a max load of 38+ grs of the IMR, so maybe I am just too lightly loaded? Also, is imr4198 a decent powder for the socom? I started there because I have some, I also have h110 and some 4227 along with others that will probably work. I'm asking mostly for discussion sake, and to avoid burning through a ton of bullets just finding a functional starting load.