When the trigger pull increases, cylinder gunked up with bullet lube, inside the slide, barrel, breach fouled with powder and bullet lube, lead streaks in barrel; then it is time to clean an individual gun.

I've shot dirty guns and I've shot clean guns, didn't make much difference in group size. Varmint rifles get cleaned after 200 rounds on a week long shoot. 22 LR rimfires get cleaned when the action looks filthy. I don't care about a powder burn on the cylinder face or a less than shiny, pristine feed ramp. Functionality is what is important. When clean burning powder is developed, I'll have pristine, white glove inspection guns. This will not happen with today's powder and cast lead bullets with conventional bullet lube.

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S&WHF 366