The 308 is a medium range cartridge. You can push it to 1000. But, it's like pushing a 7mag to 1600. A 260 has better ballistics and less recoil.
The 8.5-25 is a very high magnification scope, suitable for target shooting at extreme range. The 8x would be a lot for coyote hunting
. I would step down to the 6.5-20 or the 4.5-14. My serious coyote hunting customers tell me they prefer lower bottom magnifiications for close work and target aquisition. Coyotes are fast moving and 90% will be taken within 300 yards.
Personally, I run the 5.5-22 and 6.5-20.