@Fergus regarding my opinion on 2 shooters possibility.
My current opinion is that one shooter with a semi auto rifle would be all that was necessary to take out JFK in the completely exposed position he was , having opted to ride in a slow moving (20mph) limo in the open without the top and without the usual protocol of 2 SS agents riding on the rear of the limo.
2 or more assassins with bolt action rifles seems to me to be more risky, because of increasing probability of being discovered/seen and also increasing the Murphys law effect of a snafu occurring and not completing the task.
Therefore imo, since it actually may be a higher probability of completion of the task by a single gunman, then it’s not so implausible that a lone nut like Oswald could have done it with a bolt action rifle if the shots are spread over a 6-7 sec span of time and there’s at least 3 secs between each shot.
Unfortunately, the earwitness right beneath the TSBD 6th floor SE shooter, Harold Norman, has recalled consistently the time of all 3 shots he heard fired in less than 4 seconds judging from his boom click click sequence. (Note: It may be necessary to record a video of a person using a stopwatch while watching the video of Norman doing his boom click click sequence to prove absolutely that Norman completes it in less than 4 secs)
Less than 4 secs is too fast for there to be any reasonable probability that the MC rifle fired 3 shots imo. The fastest time ever recorded by any CBS trial test shooter who also was able to score 3 hits on the moving target ( but no head shot)
was 5.1 secs (according toDan Rather reporting it)
Also since vast majority of witness heard shots 2 and 3 “back to back “ or simulated the time like Lee Bowers rapping his hand in the desk as about only 0.5 to 1 sec apart, therefore it’s not very probable that both shot 2 and 3 were fired by a solitary shooter with a bolt action rifle.
There is the curiosity of Loran Hall and William Seymour having possibly been in the company of Oswald at the Sylvia Odio apartment.
There is the coincidence of Loran Hall at one time having possibly owned an M1941 Johnson
7.62mm Semi auto rifle that uses conical shape “pointed” bullets.
There is the coincidence of the witness who found a bullet on JFK stretcher describing the bullet as a more “pointed” bullet than the CE 399 bullet.
There is a coincidence that the M1941 Johnson rifle makes a “click” noise as it ejects shells.
There is a coincidence that the M1941 Johnson rifle was issued to Bay of Pigs operatives.
There is a coincidence that this particular rifle when disassembled easily can fit in a 24” length bag.
There is a coincidence with one witness who saw a rifle in the TSBD window describing it looked like a “machinegun” and the fact the M1941 Johnson was also designated in some configurations as a machine gun ( and with heat shield could look similar)