Last year two friends and myself did some bullet testing. We made “shooting blocks” of newspaper and duct tape. Each block was 12 inches thick. One friend used Glaser 9mm, another friend used 9mm JHP and I used 9mm Hydo Shok. Standing at 20 feet we shot at the blocks. Each person took a turn shooting into each block. After 12 shots we peeled back the layers on each block. My Hydo Shoks penetrated the least. Next was the JHP and the Glaser had the best penetration. No penetration was deeper than 6 inches.
Mushrooming was the least on the Hydo Shoks and best on the Glaser. The Hydo Shoks and JHP’s both showed plugging from the paper. The little ball in the Glaser did it’s job!