I have a model 92 that I shoot only steel shot in. I use a Briley extended IM choke and a Hastings extended X full. I shoot #4s and #1s with no problems. The 92 is a wonderful gun, shoot yours and enjoy with no worries. Make sure the choke you use is rated for use with steel shot. My X full choke is rated for use with T & F steel shot but I have never shot any that big.
Chris