Cleaning your weapons
Frankly I am shocked at some of the answers to this question on how long people go before they clean their rifles, but maybe that is just me. When it comes to my weapons I am an OCD neat freak.
This is a topic of great debate and if you ask 50 people you would probably get 50 different answers. So here is mine. I clean my rifles, handguns and shotguns after each time I finish firing them. I do not allow a weapon to go uncleaned over night after it has been fired. I guess you can just call me anal when it comes to that. In all my tours in Iraq and Afghanistan I NEVER ONCE had a single stoppage. And you can rest assured no soldier of mine hit the sack before his weapon was cleaned, whether he fired it or not. And woe be to them if I took their rifle, ran my pinky in the chamber and came out with a dirty pinky.
After 500 rounds with a brand new rifle I would say you are WAY overdue. It has been my experience that .22 ammunition as a general rule uses "dirtier" powder than high power rifles. A patch run through a bore of a .22 after 10 rounds will definitely be dirtier than a patch run through a bore of a .30-06 after the same number of rounds.
Some people will say that cleaning a rifle every time it is fired accelerates barrel wear. To that I say it depends on what kind of cleaning rods you use. I use soft aluminum cleaning rods instead of steel ones and I only use brass jags. If anything is going to wear, it will be the rods and really, who cares? Rods are cheap compared to a new barrel, that is for sure