I Used to clean every 20 shots. I dont do that anymore. I have a Savage 12FV varmint gun. I shot a .6, .66, .8 and 1" . It had a clean barrel but it doesnt seem to matter much anymore. I also think I ruined a barrel once by cleaning it too much.

But the fruits of the spirit is love, joy, peace, patience, kindness, goodness,faithfulness, Gentleness and self control. Against such things there is no law. Galations 5: 22&23