I had to vote always lead because of the poll questions. I was going to give solid copper a try but ended up trying a bullet I had not originally intended to use on game that pleased me so much that I haven’t bothered actually trying solid copper. As a result I never gave cooper a fair chance. I can’t say I’m not curious, I’m just not curious enough to give up on something else that I’m currently pleased with. Maybe if I shot 10+ big game animals per year.
Steel works in a shotgun, and nothing works when you miss, but I think people have forgotten how good lead shot was. I can legally shoot cranes with lead where I hunt, and in well made loads it is definitively superior to steel.