I'm not sure if in-game case size has anything to do with what it actually fires (e.g. .32 casings from the .32 pistol and hunting rifle) but http://xbox360.ign.com/dor/objects/14341976/fallout-new-vegas/videos/fallout_gmp_victor_90310.html might be a .45-70. Can anyone say 1886?
Digging the sights too.
Edit: Sorry for the double post.
Visually, it seems to be consistent with how http://www.winchestercollector.org/guns/1886.shtml. I tried to look at the action to see if they modeled the double locking bars that made that action so strong, but alas, I could not verify them. It is entirely possible that the rifle shown is the "Trail Carbine" resembling the http://www.winchestercollector.org/guns/1894.shtml and confirmed to be chambered in .44 magnum, or that Josh has done what I least expect, and that is include a third lever-action rifle, modeled after the 1886. I just don't expect Josh to have included 3 lever-action rifles, all which look essentially similar, and in three different calibers. If he wanted to include the 1886 in .45-70 why then have the http://www.winchestercollector.org/guns/1866.shtml in .357 and the 1892 in .44? He could have easily found other weapons, say a single shot like the Ruger No.1 or the http://www.winchestercollector.org/guns/1885.shtml, to fire the .45-70 and it would actually balance this high powered round better becuase of the slower reload speeds. The .45-70 is a very powerful round. Why use the .357 or .44 levers if you can get one that fires .45-70?
Just so you can see what I'm talking about here are the energy and TKO figures for these three rounds fired from a carbine length barrel:
.357 Magnum (158gr JSP from a 20" barrel @ 100yds) Energy - 715ftlb TKOfactor - 11.5
.44 Magnum (240gr SJHP from a 20" barrel @ 100yds) Energy - 1015ftlb TKOfactor - 20.3
.45-70 Gov (300gr JHP from a 24" barrel @ 100yds) Energy - 1815ftlb TKOfactor - 32.4
PS (Before anyone says that the barrels are different lengths or that the bullets are in different weights, I chose bullet weights from the middle range of those listed and had no choice on barrel lengths. Data from
Ammo & Ballistics, fourth edition.)
PPS (I looked in vain to find a pic that showed all 3 rounds next to each other and could not find one, but I did finally find a pic that http://upload.wikimedia.org/wikipedia/commons/9/9c/300-221.jpg)