If you got this gun, and planned on hunting it, I would immediately have the head of the stock glassed. After that, if a competent gunsmith gave it an evaluation and approved it's use, I would recommend shooting it with whatever you want. If it were mine, and I wanted to shoot something hard to kill, I would limit myself to a good handload of 1-3/8oz nice shot or 1-1/2oz lead. I currently never go over 1-1/4oz nice shot as it gives me a killing pattern out to 45 yards.