Not to derail the thread entirerly, but three excellent books on the JFK shooting are:
Gerald Posner " Case Closed",
Mark Furham " A Simple Act of Murder", and
Vince Bugliosi " Reclaiming History".
They mention ( test ) carcano accuracy, and speed of operation, and all reach the same results, LHO acted alone.
All good reads, all have decent/good things to say about the Carcano. After all, in era when Countries switched to bolt action, smokeless powder repeating rifles, the Governments of those countries were betting their very existance on the weapons they selected. Think about it: no airplanes, simple cannons, etc. The infantry, and short-barrelled cavalry carbines ( same action ), ruled the battlefield, and NO country would adopt an inferior weapon. Sure, some would later prove to be better "sporterized" then others, but for their intended purposes, ALL were good.
Mark