[quote=EnderDragonFire]
@Puppet - 2277 - 1873 = 404!
... so *that* is why I feel like this gun should not be found. (and also mean it is 400 years old!)
[/quote]
2277-1985 = 292 The G11 (a weapon so futuristic looking it still gets used as a prop in scifi movies occasionally) is 300 years out of date as of Fallout 3. Thanks to 200 years of nuclear apocalypse and 120 years of cultural stagnation, almost all the weapons in Fallout are a mix of what was common in the 1950's and futuristic anachronisms. Part of the point of the game is having that 'golden era of atomic energy gone wrong' vibe, which is illustrated in a small way through the weapons, Browning Hi-Powers (still service sidearms in some (developed) countries up to the early 90's) sit next to rayguns.
Lore aside, removing all the NV guns is going to be a difficult process on 2 fronts: firstly, there are a lot of levelled lists you'll need to duplicate and edit, before replacing only the ones you want to edit with the new copies. Secondly, balancing the new weapon distribution will be very difficult. Fallout 3 had a small selection of guns and a very simple armour system where higher DPM meant a weapon was simply better (taking into account accuracy, crit chance etc) whereas in NV you've got DT instead, which means you've got to take into account not only the DPM of the guns but their DAM. Starting the game with a 10mm pistol (and having 10mm ammo readily available) gives both the player and opponents powerful offensive abilities in excess of any armour available to either side. Add into the equation the fact 5.56mm guns have lower damage than 10mm and you'll find there's a large period of the game where the only really effective weapons the player has are 10mm guns, others being either worse in some way or much rarer.
Also, if you dislike just the way the .357 looks may I suggest the WRP?
[img]http://static-4.nexusmods.com/15/mods/130/images/36616-3-1288996921.jpg[/img]