I think that Lefever struck the 20's thinner than 12 and 16's. Every one I have come across has been a delightful wand feeling more like a 28 than a 20. If they struck them to .025 or .020 there is not that much extra metal there if honed much. And did they measure barrels much after striking? Maybe they set their standard at .020 to start with.
I have a DS 20 that needs to have deep pitting cleaned up but it is already at .018 in the thinner areas already. Last owner refinished the barrels and they are now shiney but too thin. Too thin to clean up, too pitted to shoot. I have a set of Briley 20/28 ga tubes that I could fit to it or have thought about having it sleeved into a 28 ga, 30" barrel. But the cost just makes it into one of those endless money pits I am trying to not dive into. At less than five pounds it is a joy to swing by a lit firecracker to shoot.
