forgive me, but I am having too hard of a time figuring out why the gun is able to eject a brass case any better than a steel case. I dont get it...I dont....the weights the same...the diameter is the same..the size is the same. Sorry....i dont get it. Yeah, I get the steel may over time destroy the bolt, but other than that....."dirty ammo"...now stuck...argh! Im lost.