I have a similar setup, only difference being carbon arrows (similar weight though, 425 gr) and Muzzy 3 blade 100's, which should penetrate LESS than the braodheads you mentioned. One nice muley doe, complete passthrough and one nice pronghorn buck, complete passthrough even hitting shoulder blade on far side. So I guess I am saying, maybe it is the arrows, but does not sound right. Just unlucky???[&:] Curious to see what others say.

JMAC