I know I have seen it happen before, but I do NOT recall what type of impact it took for it to happen.
I have never had it happen with any broadhead I have used, but I have generally just shot one piece ferrels like what is seen on Zephyrs, Abowyers, and Snuffers.
I have been interested in getting some of the new Grizzlies and am curious how strong those laminated ferrels are.
I have never shot a grizzly but I know Eclipse broadheads are as tuff as can be. I have split target points and steel blunts but I have never hurt a Eclipse or a Magnus.