I have been looking at the 2 varieties of .22 Buckmark target guns with heavy, fluted barrel, one carbon steel, one stainless. I am more interested in the carbon steel, lists for about $550 compared with the stainless which lists for about $750 even though I hear that the stainless models are selling like hotcakes. Any opinions out there about whether there is $200 worth of difference in performance? Any thoughts about how finicky either one might be for the ammo diet it gets fed? Thanks!