Having looked in the ammo cave it appears I must got rid of the steel duck and goose shells from the eighties. I have a couple of boxes of 1 oz. Fiocchi #7's from the early ninties from when I was shooting along the Rio Grand River. For me steel in the HD Model 23 is an academic question as I don't shoot much waterfowl anymore and I can use bismuth or the other stuff if I put in for cranes.