Buying a new shotgun tomorrow. Someone told me I should clean it before I go shooting it for the first time... But that's sounds stupid. Not only is it brand new and should be somewhat clean, but it's a pump shotgun! It should operate just fine even with quite a bit of build up. So is this true? Do I really need to clean my shotgun before I go shooting for the first time... I know it wouldn't hurt to clean it, but is it necessary?