Anyone have any opinions as to which caliber has the best subsonic offerings? The three variables I'm trying to weigh are... 1) quietness 2) effectiveness on a live target 3) range I have a suppressed 308 bolt gun that is extremely quite with subsonics. However, I've yet to shoot anything with it to see how well the subsonics will work. It's also dropping like a rock out past about 50 yards. Obviously bolt guns are going to be quieter than semi-automatics. I'm still waiting on the ATF paperwork to come back on my 5.56 suppressor to see just how quiet it is compared to my 308.