Shooting 90lbs plus and a 600 plus grain arrow and not getting pass throughs on elk? Yikes. Almost unbelievable....at least if you are taking good shots.
I have a buddy that shoots a bear with a shooting star cam. Around 650 grains at 265 a 2419 to be exact. Nothing stops that arrow. Not hog shields, not deer shoulders, not elk ribs. I saw him shoot through the brisket of a 200 lb deer and the arrow blew out the rear femur, passing through.