RE: 300 and 7mm ultra mag elk test
Have got chrono?I would check and see if the shells are loaded up to specks.I too am amazied it did not pass through.
I have seen non pass throughts with slower cartriges at less distance like a 180 speer hot core out of a 30-06 at 40 yds and many others.
I would check the loads again,maybe they were bad of something.
BBJ