I used to shoot the standard shorts for subsonic until the lr subs came out. I'm bad about cleaning barrels. Never had a problem. The contender barrel has had 3-4000 rounds out of it, I decided to clean when accuracy fell, hasn't happened yet. One little tip though, I think all that is made in shorts now is high velocity. Try to find one with a copper wash or some type of lube like rem uses. You will get less lead fouling.