It would be fine for something like a 45-70 or 38-55. I am reminded of an old Sears & Roebuck catalog (maybe a reprint) that had liners that slipped into the barrels and were fastened at the muzzle with a knurled nut. I think EAA made some a few years back. They were supposed to be acceptable for any single or double at the time so I am guessing the guns could take it. But...probably a lot fewer lawyers in 1906 also. Pressure is the key. I wouldn't go nitro express on one.