I have only shot a few thousand rounds through a bushmaster in 223 wolf. The problem I have with it is I shoot one mag fine, then i shoot another and I have a case stick in the chamber perhaps 5 times on a 30 round mag.. it seems my chamber heats up and my extracter pulls the rim off the case. I talked to a guy today and he seemed to believe I just needed a new bolt, he was shooting 22s and told me to use his bolt. so I went through three mags and no case left in the chamber. I am just a range shooter but if I can save $60-$80 per k rounds. then wolf is just as much fun as brass and I don't feel the need to pick up the steel cases. I am going to try a new bold and keep with wolf, If I change bolt and still have stuck cases I will stick with federal. So if anyone else has some Ideas I would love to hear your .02