I saw that a few years back, and got into an on line compost storm over it. There is no reason in the world, other than lawyers, that it ''can't be done''. Back in the 70's I had a Navy ''Colt'' gunsmith's conversion in .38 S&W, with a brass frame. It worked fine, and never stretched, with black powder hand loads, or Remington Smokeless factory loads [the gun was finally stolen while I was in the Navy] The reason for the disclaimer is that in a modern caliber like .38 special ,with a stout load, you would be wandering into unsafe territory. How do you control people's hand loads, or tell them that some factory ammo is too hot? You can't, hence the disclaimer. Did you know that bumble bees can't fly?Scientists have done wind tunnel tests, and run data on computers and discovered this interesting ''fact'', but no one seems to have informed the bees.