So I added a Vortex Viper 6.5-20x50 PA scope with a BDC reticle to my browning 300 win mag a bolt. Went to the range and dialed it in at 100. Four holes touching and the other two within a 1/2?. Close enough for a minute of elk. dialed in to 200 yards and three within an inch, dialed in to 300 yards and three within an inch and a half. Not enough space to shoot out past that on this trip. Will have to find a spot out on the Pawnee Grasslands to stretch out for a 400 yard confirmation. That is about as far as I go to practice. Never take that shot when hunting. Am very impressed with this scope.