Kellermans use of word "shots: vs "shells" is relative to the issue of what sounds Kellerman heard.
If Kellerman is saying he heard only 3 "shots fired" then the "flurry" must apply to "shells" which could be either bullets or fragments of bullets, or some combination of both, that Kellerman heard or saw the effects of, which hit some parts of the interor of the limo, ie, the inner windsheild, the windsheild frame, and possibly some part of the dashboard.
My question still remains if ALL the fragments are from just one rifle and I am skeptical, because the SE tragectory for the head shot does not appear to me to be possible according to the HSCA diagram of upper right rear entrance and lateral right side of skull exit points. This line is only possible if the skull is NOT rotated leftward as much as it is apparent in the Nix Film and the Muchmore photo. *
I don't understand the "nose" fragment" being so mangled having only hit such a small spherical area of brittle human bone plus a cushion of hair. I would have expected the ball nose to generally penetrate and remain only somewhat deformed. I welcome some more experiments to test this MC type 6.5 FMJ ball nose bullet fired at a tangent to a human round skull to see what the effects are and if they are anywhere close to being mangled as much as the "nose" CE 567 fragment:
The "inside the Target Car" experiment, imo, did NOT quite get JFKs head rotated as leftward as it appears in Nix flim and Muchmore film, and i would welcome another experiment with the head rotated more leftward, and also I would like to see some shots using the SW 6th story TSBS window trajectory. They should include this time a replica Hargis dummy on a motorcyle beside the car to see what the splatter force is from both SE and SW trajectory.
* also, the HSCA diagram for head shot entry/exit does not match with the radial fragmentation lines in the JFK lateral X ray, and there is no diagram to explain how if the fragmentatiion lines converging to the V notch in the autopsy photo were caused by a fragment, and if such fragment the cause, how that fragment did not strike the back seat of Greer.