Having been stuck at the house more than usual past few weeks Ive had the chance to research some things. One was ball vs hp ammo.
Every testing Ive found along with MEs comments have got me to thinking.
In 9mm thru 45 which is what I concerned myself with it seems that a Hp bullet with the exception of Cor Bon and Powerball fail to expand when tested with ballistic gell fronted with bone or a bone simulatnt.
ME comments support that as far as I have been able to find stating that if a HP strikes bone before it expands, think rib cage etc it simply acts as a fmj bullet only a bit less effective than actual fmj. FMJ once in tissue tends to at least tumble. Hp that didnt expand because of being packed with bone or sometimes heavy clothing tends to just go straight thru no tumbling.
Im no expert and I know about over penetration and all that. But with a much greater percentage of "center mass" our typical target being caged inside bone vs a small percent of soft tissue open to being hit without encountering bone I wonder if with the exception of Powerball ammo or perhaps Cor bon are we kidding ourselves believing that fmj is that inferior as a SD ammo than HP considering the likelihood of hitting bone in a SD shooting???