Ok guys, I’m not new to the reloading scene but I am new to subsonic. The atf finally decided to approve me after more then 12 months. I’d like to start reloading for my .308 savage. I don’t even know where to start. I can’t find anything in my books, I’ve research some online, seems most that I saw were using trail boss and 175gr and heavier. Is trail boss the best? Can you use you IMR’s or Vargets for subs?