Ballistic gel testing is not the tell all BUT I have done 9mm, .40, .357SIG and .45
The .357SIG clearly had more kinetic energy. Basically it rocked the block! I carry Corbon DPX as they penetrated to 17"-171/2"every time and fully expanded. Underwoods 125gr gold dot loading penetrated to 19 1/2-20" every time and expanded as much as a gold dot does. I would use Underwoods if I was LEO.
The .357SIG clearly had more kinetic energy. Basically it rocked the block! I carry Corbon DPX as they penetrated to 17"-171/2"every time and fully expanded. Underwoods 125gr gold dot loading penetrated to 19 1/2-20" every time and expanded as much as a gold dot does. I would use Underwoods if I was LEO.