While the forum was down a friend and I decided to run a test comparing the German 7.9mm S.m.K.H against the normal 7.9mm S.m.K. and S.m.K-V armor piercing rounds. The plate used is of hardened steel between ¾ and 1 inch thick. You can get some idea of the hardness of the steel from the black splotches on the back of the plate. These are the lead splashes from normal 7.9mm and .30-06 GMCS ball rounds.
The first surprise was the very noticeable greater recoil from the S.m.K.H rounds. All rounds were fired from a K98k rifle.
I thought someone else might like to see these pictures.