If you reload or have any friends that load you could work up a nasty coyote load for the nagant using hornady 123gr v-max designed for the 7.62x39. I loaded some up a few years ago and got about 3,000fps out of them. They shot pretty well and expanded quick, may not get an exit so they could be fur friendly if you are keeping fur. I only had a 4x scout scope set-up on the nagant so I don't know what type of long range accuracy I would have had with that load. Is your nagant scoped?