FWIW (not much, I know), my favorite shotgun of the (way too) many I own is a Charles Moore hammer 12 gauge that is sleeved. The sleeving job is so well done that the seam can only be seen ever so slightly under the forend or by comparing the very slight differences in the bluing on the barrel stubs and the rest of the barrels in bright sunlight. Whoever did the job provided a beautifully balanced gun. I'm sure the price was discounted as a result of the barrels' having been sleeved, but I'd buy another sleeved gun of equal workmanship in a heartbeat.
