Vast majority (2/3rds ) witness heard the sequence of 3 shots as 1…..2..3 .
If the latest experiment has the SBT trajectory implausible, then there would have to have been either another shooter or the single shooter had a semi auto rifle.
Either way though, the shot sequence would be different would it not ? Since now there had to be a shot hitting JC causing his abrupt shoulder turn very close to JFKs reactions. Therefore shots 1 and 2 would be only probably 1 sec apart.
That would be then a sequence 1..2…..3 which is the reverse of what majority witnesses seemed to have heard.
The only solution , if the the SBT is not viable, to preserve the majority witness perception, would require 2 shooters, one of whom had a silenced rifle that fired the shot at JC about 0.5 sec after JFK is hit at Z-222-223 giving the impression both JFK and JC are simultaneously responding to the same bullet.
But then you still need a 4th shot that’s from a loud rifle shot to have 3 loud shots heard and so when would that 4th shot occur so as to preserve the 1…..2..3 sequence?
Imo it would have to either be between the silenced shot at JC and the Z313 hit on JFK
Or.. it would have to be a 4th shot about 1-1.5 secs AFTER Z313.