I've never understood the fear of steel shot unless somebody can explain to me how the steel could possible make contact with the barrel while encased in a full length plastic wad. Since it's pushed by the wad there's no way it can get ahead of it until it leaves the barrel.
I thought most plastic wads had open slits running length wise which could allow some size shot to make contact with the barrel especially at the choke area.
I am also under the impression most steel shot is coming from China and is extremely hard as opposed to a softer steel shot, so where lead used to deform this hard steel shot attacks the barrel.
What shotgun manufacturer wants to admit they might have ever used a weaker or softer or substandard steel in their barrels?? JMHO