What kind of fur? Coyote? starting loads from Hodgdon give about 3200 FPS with a 100 gr Sierra HP.
That is probably too much rifle for smaller fur bearing critters (if you want to have any fur left). Even the starting loads will be pretty explosive on animals under 50lbs.
If you are looking to down load the gun and save the expense of buying an appropriate rifle you should look at Lyman's cast bullet data. IF you have experience w/ light loaded cast bullets in rifles you could do some interesting things with the little 100 grainers. Dacron filler is your best friend when working up these loads. There is a lot of unused space in that big belted case when you are going for about 2000 fps.
Could it be done? Sure. Is it safe? Probably. But I would only attempt such an endeavor if I had mucho experience reloading