100 yards, from a rest 250 gr SW 90 gr 777 rem 209 3/4" group. I didnt get to take it iut long due to haveing to load cattle and it getting dark. I can tell you this much, that thing doesnt like more than 90 gr. at 100 it opened up to 4 inches. Thursday is a new day and i will be heading out again, barring more cattle going out!