Everyone needs to check out The Box O' Truth - Ammo Penetration Testing They show how exotic ammo such as Glasier, extreme shock, and shot shells are poor performers. I know this will come as a shock to people but the top perfromers in penetration and expansion are federal, speer and winchester. The guys who run the sight do numerous tests with different weapons and ammo loads. Along with several barrier tests too. Please stick with the tired and true ammo performers with a proven track record.