Well, we have evidence from JBC himself that he didn't feel it.
There is really no evidence really that it occurred from the same bullet that passed through his wrist and reason to believe that it wasn't. The wound characteristics of the wrist and thigh are quite different. The thigh wound looked like it was struck by the butt end of an intact missile. The wrist and cuff appeared to have been struck by an irregular shaped missile. The path from wrist to thigh is not obvious and assumes a significant change in direction of a 10 gram bullet moving at several hundred feet per second. The trajectory from JFK to the left thigh does not require any change in direction after passing through JFK.
Yes, but again he said he felt the bullet hit him like a "doubled up fist" punching him in his back. That's not a pain reaction/feeling but it is a physical reaction that must have been immediate? I can't see how such a reaction could have been delayed? So, a delayed pain reaction is not only possible but based on his account what happened; but the physical reaction to the bullet was not delayed.
And don't we see that punching at circa 223? Shoulder going forward, jacket bulging. Does your scenario have him hit 2-3 seconds earlier and this shoulder reaction at circa 223?
JBC from WC testimony:
Senator COOPER. Would you describe again the nature of the shock that you had when you felt that you had been hit by a bullet?
Governor CONNALLY. Senator, the best way I can describe it is to say that I would say it is as if someone doubled his fist and came up behind you and just with about a 12-inch blow hit you right in the back right below the shoulder blade.
Senator COOPER. That is when you heard the first rifleshot?
Governor CONNALLY. This was after I heard the first rifleshot. There was no pain connected with it. There was no particular burning sensation. There was nothing more than that. I think you would feel almost the identical sensation I felt if someone came up behind you and just, with a short jab, hit you with a doubled-up fist just below the shoulder blade.