The classic low pressure 45 auto in fmj pretty much just punches a hole in tissue, looking at the wound, it looks pretty much like any pistol wound.
I believe my friend. He was there in a Saigon bar ordered to take out an NVA agent and a South Vietnamese double-agent. He made a mess out of them. Walked in the front door did the hit and out the back into a parked jeep(no driver) that was there for him and he drove away. He tells me to this day “I can still see their eyes’’. He’s now on a full PTSD disability from the VA. Took him a long time and a lot of bs with the VA to get it too.