Disclaimer*-I'm sure the topic has been discussed ad-nauseum but the forum search provided nothing and I didn't see the topic on the first 3 pages in, so here goes. Please feel free to link me to a discussion thread on the subject and delete this thread. Is shooting Wolf 5.56 consistently through an AR-15 platform ok? I watched a video where the guy said steel is about 50% harder than brass, so "theoretically" expect 50% more wear on internals. Accuracy of surplus ammo aside, how hard on the AR-15 internals is Wolf? Or Brown Bear/Silver Bear? The guy in the video said that the money saved from buying steel ammo will buy you a new barrel (which will burn out faster) and another box of 1000 rounds (or another barrel on top of the other one .) How do you personally feel about putting steel cased ammo through your AR-15, and how does it affect your rifle?