Modern USA guns have the wall thickness to handle steel....And the Brits are even shooting standard steel in much older ones...However again, i doubt many here will think it possible..However as in England, lead here is most likely on a short string...and in fact in some states and specific locations it is already banned. Do as you wish....myself I am willing to pay for bismuth because I think it performs better than steel. However, have used TSS without issue, which is even harder than steel. Either way, lead likely will be banned soon, and we better be willing to accept the new science of steel or other alternatives.
Have been thru this before and expect the responses to mostly be the same..."Damed if I'm going to shoot steel thru my Beretta or Remington or etc, etc....
Addition: Personally I wouldn't shoot steel in a shotgun with thin wall chokes....However, most standard chokes today are steel proofed or they are available.
Not sure who you're trying to convince, but I hunt with steel out of my 12 gauges. But I have an older 16 gauge I love to hunt with, and it's thin metal and fixed full choke. I won't shoot steel through that, not because it's a super expensive gun, but because it will pit and destroy the choke over time, no question.
I haven't followed up on this thread for awhile. Through the data I gathered and some helpful advice from others, I have some recipes I'm working up that I'll send out for testing. But I ended up running low on shells and time, so I bought another case of Boss for this season, so I'll be working on it after the season ends at the end of next month. When I get results back, I'll post them here.