its an RPG whats the point of raising a gun skill if your character doesent do more damage. if this was a First person shooter then yes it would be a problem. but its not
no it will not change with new vegas
Scenario:
Two people, two AK47s. We have ballistic gel anologs set up in a crowd formation. Person one is a USMC veteran who knows his way around an assault rifle, and person two is someone who has never even seen a gun up close, let alone fired one. We give each one a turn shooting the crowd. There's 30 rounds and 30 gel dummies. The noob represents a Fallout character with a low SG skill, say 1-25. the Marine represents a character with 75-100 in Small Guns.
The Marine will hit every dummy squarely between the eyes. the noob will be lucky to hit more than one. BUT here's the kicker: The one or two lucky hits the Noob managed to get do the same damage as the Marine's highly accurate hits.
Wanna know why?
The 7.62x39MM bullet is going to fire just the same for the noob as it does the Marine. The kinetic energy will be identical. However, the accuracy will leave much to be desired from the noob. The Marine is well trained and well experienced. He knows how to properly handle, aim and fire an assault rifle. He, therefore, is going to aim down the sights and fire one round per target. The noob has likely only heard the AK exists from movies and video games, thusly they're going to hold it at the hip and spray away. They'll be lucky to hit a single dummy.
My point here is that skill with a gun does not change the damage a gun is capable of producing. It only changes the accuracy of said gun. It will also affect reload times, as the noob isn't going to have any idea how to reload that AK while the Marine can do it a couple of seconds. Why the Fallout designers seem to think an unskilled wielder suddenly makes the gunpowder way less efficient is beyond me. I think the damage should remain the same, but as weapon skill improves accuracy, reload time and the like drastically improves. IF you manage to luck out and get a headshot it should do just as much damage as if you had a perfect weapon skill.
I can easily enough understand skill causing other projectile weapons to lack power. Bows, throwing spears, things like that. Grenades won't fly quite as far or be as accurate, although they should still do the same damage.