Back in the late 60's early 70's two older friends of mine bought Savage imported Anschutz 54 sporters from Sears. The one friend (my best friends Dad) shot his some, but other one Mike used to shoot his quite a bit in local rimfire benchrest and BR50 matches. His gun consistently beat even the heavy gun scores.
In the instructions for those rifles it stated something to the effect "This is a ultra-honed lead lapped barrel. Use of a bore brush or copper clad ammo will void the warranty."
To this day, I will occasionally run a damp patch through the bore of my rifles if I am shooting ammo with similar type lubes. If I am switching to a different lube type I will run a trimmed down brush for about two or three passes.
