Wouldn't you be over penetrating with fmj? I have seen some impressive tests with Winchester PDX1 ammo online. I'm talking about denim + ribs + ballistic jell, and it manage to go 12 inches into the jell after breaking some bone.good old fmj ball ammo for me. did some wet phone book test many mango season ago and found that fmj ammo would go through two very fat wet phone books. gold dot and hydro shock did not and they did not expand much.