I was thinking that it might be interesting to change our Sniper Rifle to use 7.62, instead of .223.
The description of the weapon says it was changed to use the more common .223, but it's possible to get 7.62, which is not so different from the commercial .308 it was supposed to originally be chambered in, so logically it makes some sense.
From a gameplay perspective, I was thinking that making it dependent on a form of ammo that is probably going to be more rare for some time, (considering the proposed changes to crafting good things, etc) would further cement the idea that some weapons are rare things, and not so easily acquired. So beyond potentially being harder to craft, the gun would also use ammunition that wasn't readily acquired or produced.
It would also make the gun different, naturally, what with 7.62 being very middle of the road in terms of penetration and damage. For me though, the big thing would be distinguishing the Sniper Rifle as being something that was logistically, and to an extent, mechanically different from a mere Hunting Rifle. (For that matter, I might also suggest that the Hunting Rifle be given access to some form of hollow point bullets. the lack of this seems strange to me. Even the humble 10mm pistol and pipe rifle have two forms of bullet, but the Hunting Rifle doesn't. Having a similar dynamic would be nice, and actually let you pop Molerats with the one round, but not anything with armor, and punch holes in low tier armor with the other, but still fail to do a lot of pure damage potentially.)