What kind of velocity are you guys getting out of your gas guns with barrel lengths with 75-105gr projectiles in these ranges? Planning to build a critter gun, for shots 0-600 yards but is also 1k capable.
Pretty awesome performance from such a short barrel, and would an easy decision if that was a gas gun. JBM says 3.5 mils to 600y, and 8.0 mil to 1000y.