For plinking, which is what I use my mosin for 95% of the time, I use Silver Bear or Brown Bear, sometimes Wolf. All work just fine and are accurate enough for me at 100m. For hunting I just grab whatever SP 7.62x54R is available at the LGS. If there isn't any of that I'll just use the Bear ammo. Its not like I'm hunting elk with it, just hogs, armadillos, possums, and the like.
"A life fought for others is a life worth living"
"A good death is its own reward"
"Amat Victoria Curam"