Other than a bore that looks like a gravel road there is no reason to re-bore any rimfire....really the only rimfire bores I've seen that needed a re-bore have been from the turn of the 20 Century using cheep steel compared to now....
Lever action tend to get abused at the muzzle bumped and a cleaning rod doing most of the damage.....
Have the muzzle touched up then work on different brands of ammo....getting it re-lined will not make it a instant 10X shooter....
