Trying to decide on an 18" vs 20" barrel for a 6.5cm that will be used mostly for steel target shooting out to 300 yards, deer hunting and possibly elk hunting. Planning on shooting suppressed, which is why im leaning toward the shorter lenghts. Any big concern with going with 18" instead of a 20"? Ballistic tables dont seem to show too much drop out to 600 yards and I doubt Ill be shooting any further. Anything I am not considering? Weight of rifle is not a concern to me, more the maneuverabilty of a longer rifle.