Ok first off i bought a red dot scope for my mossberg 500.i was wandering how everyone else lined it up good?i just set up a piece of cardboard and shot at it around 10-15 yards til i was pretty well centered.i done this with my full choke with 2 3/4 7#7 shells.,how much different will this shoot when i throw in my turkey load and switch to my undertaker choke?also anyone else with this gun and a undertaker choke what load does it like best?by the way mine is the undrtaker h.s.(hevi-shot)