Shot a 9 pointer 2 years ago with a Montec. When I recovered my arrow i noticed the tip had been bent some so I knew I had hit something solid.

Ifound the deer and the quartering towards angle showed that I had definantly gotten into the shoulder. When I butchered it it clearly showed the broadhead and blown through the shoulder blade and broke. It wasn't a complete passthrough but it did poke a hole in the other side.

The shot was only about 7 or 8 yards away though.