I can only speak to what I have seen. My Dad and I shot up some 1 gallon water jugs with 380 HP ammo out of a Ruger LCP. He had some Winchester soft point that had a flat end with exposed lead, but no hollow point. It penetrated 4 jugs of water and kept going. Rupture the first one or two okay. I had some Underwood Extreme Defense which ruptured the first jug heavily and ended up in the 3rd. The Inceptor round I bought went through 4 jugs and kept going, partially ruptured the first two. The surprising part was some Hornady HP ammo. I think it was the cheaper American Gunner ammo. The bullet stopped in the 2nd jug. I figured the penetration with that ammo would be pretty poor. So in my experience the Inceptor ammo penetrated very well in water jugs. I might have to think about testing with pieces of wood or other solid object in front.