How did those fragments get past Connally's torso and whatever happened to them? The size of the wounds rule out them being caused by small fragments. What happened to the bullet that entered his back and exited his chest?
C399 exited JFK's throat undamaged after passing through his coat, shirt and flesh, and then penetrated Connally's back at high speed, smashed a rib, exited his chest, smashed his right wrist, and embedded itself shallowly in his thigh, correct?
Not at all implausible for a round-nosed, full-metal-jacket 6.5 mm bullet bullet travelling about 2000 feet per second when it struck JFK.
-- MWT