I have read numerous threads about this and never have heard that Browning indicated the BSS should not be shot with Steel Shot. As I recall, with these guns it has been more of a matter of having open chokes rather than Full. I have a BSS Grade II 12 ga that has been my Duck gun since I bought it new in 1985. When I bought it I had the chokes opened from F & M to M and IC. I have put thousands of rounds of 3" Steel through it with no adverse effects.
Thanks,
Gordon

Gordon

If you don't fly first class, your heir's will!