[quote=@Willy Vereb]
2.) Pump-action and Lever-action are both are as old as the ancient ages, even for weapons. Your decision to ban them basically also removes Gastraphetes and Chu-ko-nu, among others. In addition neither weapons are semi-automatic, that applies to weapons that load the next round by themselves. Blowback operated action was the first such example and from that you can guess how very different that would be.
In addition there's a difference between pulling back a pump for a gun,  where it only requires enough force to load the next cartridge, and for a crossbow. In a sense banning pump action is the equivalent of prohibiting bowmen to draw back the bowstrings.
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[@Darkspleen]Just ban clip and magazine fed weapons.  Chu-ko-nu were useless at anything but extremely short range and were only ever used storming keeps.  They have abysmal armor penetration.  For a crossbow to be remotely useful against even lightly armored troops it needs a draw weight heavy enough that a magazine is only a hindrance when it is drawn.