The Wingun Mosin is pretty skirmishable. It just shoots dang hot for most places. Gas bolt action rifles are just annoying in general though. Spring is just a lot more simple and reliable. No gas, no electricity, just your hands and some BBs.
I’d go modern if your planning on going to Milsims. Even Milsim West does allow Russian WW2 guns however, at least if your playing militia (maybe sometimes yes sometimes no for Russian Army) but bolt actions are reserved for special sniper teams only. You should have gotten something like a PPSH, very skirmishable, can be used WW2, Vietnam, up to present day those are really nice if you can turn the mags into midcaps.