Havent got to shoot my ar but I was checking on how well it cycles. It has no problem with brass ammo. But when using steel it was hard to pull the charging handle to eject the round. My chamber is Crome lined. I'm thanking just a good cleaning and lubing should fix it. It was my uncles gun before I got it. He said he has put over 500 rounds of still through it with no problem. Any thoughts?