40 S&W Ballistic Gel Test. PPU 180gr JHP

40 S&W Ballistic Gel Test. PPU 180gr JHP. Fired out of the Glock 23 Gen4 thru four layers of denim (per IWBA protocol) into calibrated ballistics gelatin. Jacket seperation and no expansion caused the round to go straight thru the gel. We gave it two chances and it failed both times.