Let's see... Gregorio Fires... hands the rifle to Luigi... Luigi cycles the action, fires, and hands the gun to Giuseppi... who cycles the action, fires. 19 seconds. Obvious proof that a team couldn't do it.
I may be wrong about this; but
The only thing the testing has going for it; is it seems some of the testing was performed at the very factory it was made at; Carcano.