There were several 1 1/8 oz. loads using Steel powder below 9K , and some 7/8th oz. using AA hulls that are in the 8K range. These may not seem as low as you may want the Fox should handle a steady diet of those no problem. If the Smith barrels are as thick as they started, and the head of the stock is glassed you should be good to go. The pressure of 2 1/2 shells are below 9K. YMMV