No, craft weapons can only load one ammo type. To be specific, they don't load clips in the same way battlescape guns do: battlescape weapons get their power and ammo count from a clip item, even if that item is itself, while craft weapons get their damage characteristics from their own definition. The ammo loaded in the weapon is just stored as a number of shots that weapon can take; it doesn't care about the item that loaded the ammo into the weapon.
Edit: Also, the ruleset for craft weapons will only load a single item name as a string fir the weapon's clip, it won't accept a list.
