dean, it depends entirely on YOUR barrel. I tried one of these in a .223 barrel or 2 and got so-so results.You wont win any bench matches with one,but you COULD kill a rabbit in an emergency situation. Groups were large at 75 yards,like 8-10 inches. A buddy bought it for a hunting trip to Alaska. He thought a .223 contender with one of these and a box each of .223's and .22 rf' s would take care of any small game ,edible or not, he ran into. His 10" barrel was a bit MORE accurate than my 14 and 21" barrels..