So manifesto publishes a study that was not part of the WC, but a red herring.
You know all day long I have been rolling over this in relationship to JFK. The experiment had a pool of blood that was impacted by a cylinder. And the blood displaced by his cylinder. The pool has no bounds and therefore no restrictive force as the blood in the head has. Some questions remain, the cylinder was in freefall. Were tests made at higher than freefall? As smartcooky has asked the study concerned low velocity impacts. If no studies were made with high velocity impacts, then one can not make a correlation between high and low velocity blood splatter velocities. I'll give credit to manifesto for finding this study, completely not in the WC report. However the questions concerning high velocity impacts tends to invalidate manifesto's claim that blood splatter exits faster than the bullets velocity, perhaps close to but less than the bullets velocity, but not greater. Evidence taken not in context is a form of logical fallacy.
Indeed, manifesto completely fails to understand the dynamics of the the situation with regards to the bullet impact and its relationship to the Zapruder film.
Abraham Zapruder's Bell and Howell movie camera has a frame rate of 18 frames per second; one frame every 56 milliseconds (ms) and a shutter speed of 1/40th of a second; 25ms i.e. the shutter was closed for 31 ms of every frame.
A Mannlicher-Carcano has a muzzle velocity of 2300 feet per second (fps). If we allow for the slowdown of the bullet velocity for the 265ft traveled, I estimate the muzzle velocity would have been around 2000 fps. At that velocity, the bullet would travel 50 feet in the 25 ms the shutter was open. This means that this camera was utterly incapable of capturing an image of the bullet. Even if the lens and film combination had sufficient resolution, which it doesn't, and even if the shutter was open when the bullet entered the field of view, it would appear as a line across the image from edge to edge.
However, a bullet slows down more when it passes through a human head (which is about 8 in from back to front) it would lose a small fraction of its velocity (as kinetic energy) on impact (<5%) and a slightly larger fraction (<10%) while passing through the head. So, lets double that to swing the numbers more in manifesto's favor
Now, even in this best case scenario, the bullet striking JFK's head at 2000 fps the instant the shutter that took Z312 opened, and slowed down by 30%, it still has a velocity of 1400 fps on exit. Again, taking the best case scenario, and using 1400 fps as our number, in the 31ms that the shutter was closed between Z312 and Z313, the bullet has traveled 43 feet. This means, by the time we see the splatter in Z313, the bullet has already gone..... the splatter is much, much, much slower than even the slowed down bullet.
Worse yet for manifesto, he's talking about a high velocity, soft-point bullet. A typical rifle to fire such a round, say an FAL or an L1A1 has a muzzle velocity of around 2700 fps, and fired from the knoll, that is a much shorter range, so the velocities will consequently be much higher.
The upshot of all this is that if, as manifesto wrongly tries to insist, the kill shot was from the front right, the bullet cannot be continuing to accelerate JFK's head backwards from Z314 onwards.
