Buffalo Target

I'm looking at making a buffalo target for a local shooting range. I'm planning on using AR500 steel and something similar to this picture (it still needs work), the thin white lines along the jaw-line and horn-line would be thin cuts in the steel to differentiate the head. To get the proportions correct, I'm looking for information on how wide a buffalo is ear-tip to ear-tip and how wide on the outside of the horns a buffalo like this would be? Thanks for any help you can offer.

 

In my experience buff ear to ear is roughly 36"...used as a guide to judge horn width when possible.

 

If going according to the books you will work with roughly 33" ears and 36" spread on the pic

 

Thank you for the input. I'm hoping to make the target realistic in size so that whatever distance or position it's shot from the feedback is accurate.