The process of "sleeving" has been done in England for many years, and well before it was commonplace over here. The English also stamped guns as such, by either the gunsmith, or the proof house.
The term is commonly used, but a bit of a misnomer, as there is another process, where the entire bore of the original barrel is bored out, the whole length, and a 'liner' is partially pressed, partially "shrunk" into place than final bored, honed, and choked. The process is done by Teague, and others.What is refered to as 'sleeving' is also commonly called 'monoblocking'.
Parker Hale, in England, and a company now out of business in Kansas,( Actually, they're not out of business, just not doing the sleeving anymore) known as the 90-06 Armory, commonly bored out guns that were shot out; lacking any rifling, and ran a sleeve down it's entire length. Again, by law, in the UK, this was revealed. '90-06', who got their name, by working almost exclusively on the model 1890, and 1906 Winchester pump .22, would bore from the breach end, to within about an 1/8" of the muzzle, so that the sleeve wasn't apparent. Guns given such a treatment, that had little cash value prior, would be made to be good shooters.
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