So went to the range today to try out and possibly sell some Slide-Fires. Hadn't tried the new toy out on the 9mm Oly Glock mag AR yet so why not. I'll have to say the rate of fire was impressive, but upon inspection of some of the brass I was a bit concerned, to say the least. (see pic) Needless to say we stopped the experiment. Now this was using 115gr Winchester white box and the factory supplied buffer. What I can't verify is if the bulging was a result of premature extraction or actually firing out of battery. I would think an out of battery ignition would flat explode the case. But I'm curious to see what any of you think of this. I would say about ten percent of the cases did this out of a single 33rd magazine.