both 5's and 6's are good,i shoot 3 1/2 in 5's with a kicks choke and its great from 40-50 yards.as for the 20 gauge,id say it can shoot 30 to 40 yards(40 might be pushing it).get yourself a slate call too,imo they sound the best.also you might want to get a owl hoot.or a crow call.my #1 tip is dont over call and hold still.good luck.