I clean mine after 20-40 rounds have been through it...I do not clean during deer season...I take my stock off and clean the bottom of the barrel every year, clean the trigger and lube and reseal the stock (wood) every 3-4 years and check the scope screws every year...Before shooting, and after cleaning, I run a dry patch down the barrel...My first couple of shots might be 1/2 inch out of the pattern, but not much more than that....If I shoot quite abit throughout the summer I clean again before deer season and check my zero at least twice during the season (we have about a 2 1/2 month season)...

Now, I also use my deer rifle for varmit hunting, whenever it gets soaked, it is fully taken apart and cleaned also, whenever I make a "bad" hit I always recheck the zero...

I don't run a brush down my bore, and use Sweets...