Gough Thomas in the 1975 3rd Edition of Shotguns and Cartridges for Game/and Clays wrote:- “and of all the British shotgun barrels passing through the Birmingham Proof House last year some 57 per cent were sleeved”.

He was writing when the price of sleeving was less than the value of the sleeved gun.

It would be interesting to know the present percentage.

At present prices of sleeving it has to be a very good gun (or treasured heirloom) indeed to make economic sense.