As long as you don't fire it through a full choke, you'll be fine. If it has choke tubes, go with modifed or improved cylinder. I used to hunt ducks with an old Remington mod. 11 made in the 1930's. Fired a lot of steel shot through that gun with no ill effects whatsoever. My BPS was made in the 1980's and was made to have steel shot through it. The modified choke tube says "lead-modified, steel-full". I believe the Weatherby's were designed to use the same tubes as the old Browning Invectors.