I shoot a few rounds of my carry ammo after I practice with my reloads about once a week. I notice that the rim gets nicked by the extractor and looks rather ragged after about 3-4 times. I have never had a failure but it seems like a good idea to cycle it through. I believe a thorough cleaning once a week is just as important. I disassemble and inspect my 1911 down to the firing pin after every trip to the range. God forbid I would have to use it in a defensive situation but it gives me a sense of comfort knowing I have done my part to be prepared.