I have a kimber ultra II and am currently experimenting on the ideal type of ammo for this gun. I have already fired about 400 rounds in this. I have tried using golden sabres 230 grain. There is no noticeable difference in the recoil felt with 230 grain ball ammo as expected. However, when I tried speer dot 185 grain, the recoil felt the same if not a little more. I confirmed my suspicion by shooting about 50 rounds of this same weight. Has anyone had the same experience? I still have to check other brands of 185 grain.