A friend of mine had shoulder surgery recently that's pretty much killed his ability to properly shoulder a long gun. He has been getting around this by putting the butt of the gun more or less on his bicep. Apparently he went squirrel hunting the other day with a single-shot 20 gauge he's been using for half a century and after a few shots he was seriously bruised and unable to continue. So he's looking for a .410 and since he's less enthusiastic about the internet than Ken Hackathorn, he asked for my assistance in rounding him up a good squirrel gun.
He wants a .410 single shot, preferably a Winchester as every Winchester single-shot he's seen patterns extremely well. I have an old 16 gauge model 37A with a full choke that attests to this, as that sucker will reach out there and touch critters farther than most 12 gauges.
So I'm gunbrokering and I encounter model 37 "steel built" shotguns, and the model 37A that I'm somewhat more familiar with.
Does anyone know what, exactly, a "steel built" 37 is? Is it any better or worse than a model 37A in terms of quality? Materials? Capability?