I have had better luck with the heavier bullets, 100-120 grain, for pelt hunting. A good many years ago the 257 Roberts was my only rifle and it had to do double duty for big game and varmints. It was pretty harsh on coyote hides with the 75 grain bullets and almost as bad with the 87 grainers. I never did try the solids. The 120 grain Speer was my big game bullet at the time and it did a pretty fair job on the coyotes without making extreme holes. Of course hit an offside shoulder and all bets are off. That can make for some interesting sewing.
"a large number of red blooded Americans have been striving to make us a Nation of Rifleman. We have succeeded. May we ever remain thus, for the privilege to bear, and the ability to use weapons is the greatest guarantee of Liberty." Townsend Whelen