Bought a Ruger 10/22 tactical about a month ago due to the cheap cost of shooting. Picked up 2 Butler Creek 30rd steel lips and both worked great! Then bought the Pro mag 50rd drum thinking it would be the ultimate mag for that gun. Was I ever wrong, looks great in the gun doesn't work worth a flip. Won't even chamber 1 bullet. Got to looking at the lip and the top rail looks to be too long to let a bullet chamber. Was wondering if anyone had a solution? I was considering filing down the top rail a bit, but thought I would ask before doing.