Why did you throw "The Magic Bullet" in there?
Regardless, off the top of my head (pardon the pun), it seems to me that about one-half of the bullet was never recovered.
The name magic bullet is uzually uzed by thems who reckon that it was not possible for one shot to go throo jfk & connolly (in the circumstances).
I am ok with there being just the one shot doing all of that injury (in thems circumstances), but i like to use the name magic bullet anyhow.
I would say that most of the 55 grains or 60 grains of Hickey's hollowpoint AR15 slug were recovered or seen in xrays etc.
The small remnant that veered & exited & cracked the windshield probly then bounced out of the limo into the street & was never recovered or seen.
No, wait a mo, one of the Motorbike police reported that a slug bounced offa his motorbike (alltho there has been some argument that this was not at the time of the headshot i think).