I don't have more developed thoughts on whether making them separate skills is worth the complexity, but I think I'd disagree mildly with Ben about whether battery powered "automatic" weapons are better -- not due to rate of fire but due to requiring only the trigger hand rather than that and another to work the action (e.g usable while maimed).
That's *any* flywheel gun, which are not classified as automatics generally. They're not covered by the wall of skills either. Yes, they tend to be the more high performance platforms.
Governor Stark Hasturi