Here are the barrel wall measurements:
Muzzle: .065 L .054 R
9": .037 L .032 R
15": .037 L .032 R
24": .052 L .054 R
The left barrel is marked "Not for Ball", apparently indicating choke-boring.
The original bore dimensions are stamped .728" in both, after lapping they are stamped 18.6 mm (.732") in both. I'm told they chime when suspended from the hook, too.
So lapping (honing?) reduced original walls by .002, if I have the math right. Anyway, the thickness appears fairly "stout", so sounds like they might just be able to handle a few more rounds. Soooo........
If anyone here knows any reason why this gun should not find its way to the pheasant fields of Saskatchewan, let them speak now or forever hold their peace.
Of course it would take its turn with the Parkers.
Cheers,
Jack (about to succumb to doublegunitis it appears)