Presidential asination question...6.5 Carcano Or .50 BMG?

Well civilians couldn't get a 50BMG in that time. .308 we hard to come by(if you know what i mean) 30-06 didn't really have good bullets then like you did for the 6.5caliber like the carcano. Yes there are a dozin of calibers then to pick from. Really if he did do it, which very doublty, because if there were three or more they might of all had a carcano, and got them cheep in a lot of rifles. Who knows thats why the JFK asination is still to me a huge myster