Another minor detail: I have no doubt that anybody above the age of 5 who has seen a picture of a rifle could make that shot, but a trained marksman attempting it with a Carcano? Why? That thing is more liable to jam than get 3 shots in a row.
I guess I should answer that one. I am old enough. While getting ready for deer season a friend of mine showed me a new rifle he bought by mail order from Kliens. Yes, it was the same rifle Oawald used. We took it out for some test shots in early November 1963...just days before Kennedy was shot. The rifle is typical military issue. Not great, but it did work. I was able to operate the bolt at reasonable speed. Not like a Remington 700, but better than you think. IMO, after shooting the same rifle Oswald used, the shot can be done...not easy, but possible.
BTW, I didn't vote. Maybe because I was around at the time. I am still not sure what choice to make.