Each rifle is an individual.

Inasmuch as kids eat different foods, and make different sized messes, and like different clothes and music, so, too, will different rifles like different ammo, and become fouled at different rates.

My .30-'06 gathers copper VERY quickly. Then again, it doesn't seem to really tighten its groups UNTIL it's been fouled. So, I don't worry about ultra cleaning 'til I'm storing it for a while.

BTW, I've found the Gunslick foaming bore cleaner to be a tremendous time-saver when it comes to cleaning a rifle. I'd highly recommend it if you're getting tired of the (powder solvent + bronze brush: repeat!) regimen.

FC