IMO the sks is fun to shoot. Accurate........no. The other to .22LR and .17HRM are too lite for big coyotes. Remember the 7.62x39 has around the same power&range as a 30/30 win.

Do you have a " deer" rifle?......better to use it I think for practice for deer season.

You might check out the New England Arms Handi Rifle single shot...Around here they sell for about $180.00--210.00. This would make a nice gun to keep in the truck for coyotes. Caliber?........I would get a .243 win.

good luck and hope you thin out the d@^n critters.[>:]