New ones get a tear down, once over, and lubed. I don't "fluff and buff" till I have @ 500 rounds down the pipe on pistols, 50
or so on rifles. That way if there is a reliabilty issue I can see better where the problem might be.
After that, buff and polish, pistols get 100 rounds of carry ammo before going in the holster for regular duty. Rifles then get a serious zero and ballistic cheat sheet made.