ok, for shots around 200-250 yards, you CAN NOT go wrong with ar-15. I have a bushmaster A3 in 20", standard heavy barrel, crome lined, and I shoot 10 cent rounds of (wolf 55gr FMJ, cheap bullets) and I can easily get 2-3 " groups @ 200 yards. I know 2-3" is nothing to brag about, but im using the cheapest types of bullets you can think of, If i was using premium stuff, I bet I can shrink those groups to about an inch @ 200 yards.