well i have had this 40cal SMR going on 3 years. i never had it sighted in precisely, i always knew where to hold it to shoot a squirrels head off with no problem. well yesterday i took my time with it and zeroed it in off the bench at 50yds. the group on the right is playing around with the sights and one a little low. the group in the center is 4 or 5 shots, 5 maybe i lost count. the load this gun likes is 55gr. of goex 3f with a .395 Hornaday ball and .018 ticking with dawn dish soap and water. the thing is you can shoot a squirrel with 40 or 55gr. it will blow him in half either way if you don't hit the head. i am going to kill a couple of SC deer with it this year,,,,,,,,,,,,,,,,