I've punched through one shoulder blade before, never 2. I don't remember ever hitting one in the "socket" with a bow, so I can't comment on that.I've had great and not so great penetration issues with a number of BH's, thats why I switch brands often. Always looking for something new and great I guess.[&:]I agree with Rob about Muzzy's not being what they once were. Still a good buy for the money, but not the same quality they were 15-20 years ago.