i see a lot of people recommending using 6 shot for squirrel, which i used to do, but i read somewhere last season of using express 4's for squirrel and i liked that a lot better. By using the 4's they seem to reach out a little farther, and they also go thru squirrels a little better (less chance of biting down on a shot when youre eating them). I aim a little off the front of the squirrel so it doesnt get a full blast of shot, give it a try