aim small miss small.....very good theory to live by IMO.....my buddy never shot anything BUT a 3d. i took my bag out and he couldnt group for beans. i didnt shoot a 3d till then. i didnt have problems killing the 3d deer. and drilled the bag. he shot the bag alot and couldnt get a group. i think the reason i didnt see any diffrence was because i picked a spot and aimed for it every time. at home i practice on my bag with 1 inch dots. next time i reface it im going with smaller dots. probably make quarter sized dots or something..something small but large enough to see at 50yds