RE: 20 ga. ultra slug load advice.
I have a 20gauge Ultra Slugger and shoot Lightfields in it. It will shoot a 1 hole group at 50 yards. I have 3X9 Weaver scoope. I can shoot 4" groups out to 125 yards and would take a 150 yard shot with confidence. But most of the areas I hunt 100 yards would be about the max.