Didn't Oswald buy his 30-06 mail order? I don't recall people getting up in arms about that back in 1963. I think we can plant the flag of when society got stupid about guns somewhere between then and now. However, a case can be made it was really 1934.
I don't know where he got it, but IIRC, the rifle was a 6.5X52 Carcano.If a 7.62 (.30 caliber) bullet was recovered from Kennedy, Oswald would have had a hard time putting that down the pipe.
Yep, society got stupid in '34, making machine guns, sound suppression devices (mislabeled silencers), short barrelled rifles and shotguns illegal. The Miller Case, acting under the idea that a firearm had to have military utility to be considered under the 2nd Amendment, failed to demonstrate to a panel of ignorant judges that the short barreled shotgun had, in fact, been used as a trench weapon in WWI, as Miller died and the Defense did not present its case.