There are lot of variables when it comes to ballistic tips and splash wounds. Calibur, velocity, angle of impact, point of impact, etc. From my experience, with a shot to the spine or top of the shoulder, generally you'll see bigger entry wounds with the faster and smaller grain bullets. Anything square in the shoulder and you'll be fine.
Some of the biggest holes I've ever seen in coyotes came from a 25-06 shooting a 90 gr. positive expansion point (very similar to a hollow point).
As you'll learn over time, waiting for the most ideal shot angle is not always feasible when calling coyotes. Many times you have to take what they give you and hope you put the bullet where you held the crosshairs!!!!
Geoff