Re: New barrel brake in
Good advice so far.
Premium barrels don't need it and may respond poorly to it.
That Savage probably would, but don't go overboard. Break-in just gets the throat smoother sooner, beyond that, there's no real need; it all just happens anyway.
I would limit my break-in to one, or at most two, 20rd boxes of commercial basic (American Eagle, Rem/UMC, Wolf, Prvi Partisan, etc.) ammo, and concentrate mostly on gently soaking out what copper deposits occur. Five minutes per soak at most, don't throw a lot of time at this.
Once the copper fouling declines significantly you're done, and if it takes much more than 20 rounds, you're done whatever the patch says; 40 is way more than enough.
Shoot one, clean one for 5, maybe 10, then 5rd groups for the remainder.
Don't get wrapped around these kinds of axles.
As for regular cleaning; I do. Not so mouch about accuracy as about preventing pitting from prolonged exposure of fouling to air and moisture.
If it's gonna be put up for more than two or three weeks, do the responsible thing and remove the bulk of the fouling, then give the bore a decent preservative coat of a good gun oil. It's just plain old simple good preventive maintenance.
Greg