My boss has a Remington from 1962 that still shoots eggs at 100 yds! He only uses patches to clean the barrel. The most wear you can get in your 22 barrel is from CLEANING! The bore brush is a LAST resort...only if you have crazy lead build up that you can't see the rifling. Like it was said earlier, only blatant abuse and corrosion will ruin the barrel.
There are no accidents, there is only ignorance, mechanical failure, or "ACTS OF GOD"! I load 3000-5000 rounds a day, 6 days a week!