I am sticking to Slick tricks but I took the advice mentioned on the slick trick website, the bigger the animal the smaller the head. I only shoot magnums now and have complete passthru's verytime. My waterbuck last year, at 500pounds got two broke ribs and went 40 yards. No crooked blades, or openig in flight because of a branch you hit.
Tough as nails these broadheads....
Frank