I don't see anything in the autopsy reports regarding an opinion of hypersonic velocity.
Read my post regarding two cases of low velocity head and neck wounds in the more recent thread. Compare those cases with the tissues damage in the autopsy reports. The evidence is there. Hypersonic velocity tissue damage.
In spite of what Jr. boyette claims he saw, read his Dad’s autopsy report. Both head wounds had “quarter inch entr(ies)” through scalp overlying bone (tissue elasticity not a factor) and both did considerable damage to the brain and then both either penetrated or came to rest in Petrous bone. There is a reason it is named Petrous bone. I also, again, suggest you read my post about two sub sonic injuries in the other thread and ponder a bit.