My .458 SOCOM upper for my AR-15 rifle is due soon, and it will be time for reloading. I have all I need to start, but shooting lead is an area I would like to explore with this rifle. I am thinking about your 325 gr. FNGC, but have two concerns. First, are there any problems with shooting a GC lead through a gas operated autoloader? I doubt there is, but better safe than sorry with a brand new upper. Second, do you have any information as to whether the flat nose bullet will feed through an autoloader. Speer 405 gr. jacketed bullets reportedly do fine, as do 300 gr. JSP, so I see no reason why these would not also. Give me the thumbs up and I'll send in my order, along with the ML lapping bullets I need. Thanks.