If you will sit and stare at any S&W top break SS in .22 caliber, you will eventually realize those sneaky folks put a rimfire barrel on a centerfire frame----an unfooledaroundwith centerfire frame (with an equally unfooledaroundwith hammer/firing pin---and it works just fine. Having come to such realization, you will quickly note the bore is not concentric with the barrel forging (in any length barrel) throughout its length. If you are fortunate enough to have some extra barrels----both rimfire and centerfire, you will also quickly note the centerfire bores are concentric. Then you will understand perfectly why Henry's bore isn't centered----anymore---and why it shoots just fine---although I suspect Henry may have had to mess with his sights some----but I usually don't understand all I know about that.

Ralph Tremaine