Yes - happy new year - The stocks are easily 'lowered' in the comb and can be dished slightly. Mine is an Armi San Polo, Italian, I'd expect, had a shelac/varnish/blonde finish of a rather blonde stock - brass furnature- seems to be an Italian copy of a Southern copy of the Enfield. Read somewhere the South used brass furiture where possible sometimes to save on iron. Could be true. I stained mine dark reddish brown and it looks more like an Enfield with brass furniture.
Anyway - mine has a tight bore - but proper progressive depth rifling - .003 to roughly .012" - saw it with a bore scope. The military specs were .008" deeper in the breech than at the muzzle. Bore looks nasty-horrid just back form the muzzle about 4", but shoots very well & cleanly at that, for all the rough looking insides - go figure. Managed a second place on the veggie trail at Hefley Rondy with it, using the .565"X.570" oblong ball and .0225" denim patch but upped my charge to 82gr,. for some odd reason - WWWF/neetsefootoil for lube. The added elevation from the 7gr. increase in powder charge is slight, maybe 1" at 50 yards is all - didn't matter and oh my, did it shoot well.
Oh, did I mention that it shoots better and better, the more powder I put in - funny - all my rifles do this except for the .32. I suspect it will too, if I increase the ball size or patch thickness.
Interesting tools, these muzzleloading rifles and smoothbores.
Due to the .574" bore, I suspect they were round by the time they were flush with the muzzle. They load easily with the steel rod - of course, helped along with a short starter for the final seat on the powder- same way, say pressure every time.