I will be using a Mossburg 500 with a xx Mossburg full choke. I shot it for the first time last night at 20,30,40 yards and all the test shots would have killed a Tom with no problem. The shot is Winchester Supreme number 5 and it is a 3" shell which is the biggest it is able to fire. For 10.00 bucks at Walmart it does an OK job but I would like a little better performance and a few more bb's on the target out at 40 yards. Any suggestions from you who have a Mossburg 500 who have found a good load for this gun and type of choke would be appriciated.