I've taken two elk with a lam recurve 56#. The first was with a 3:1 style broadhead, extremely sharp, got complete pass through at 25yds with a lighter arrow (approx 480gr). The arrow dead centered a rib on the way in and clipped one on the way out. I feel that the shape & sharpness of the head was the most important thing in this particular scenario. Second elk with same bow, different broadhead, arrow around 500gr. This head was not as long, maybe 2-2.5:1 with a bleeder blade installed. I was a little worried about the bleeder blade, but the main blades were very sharp. Again at 25 yards broadhead went completely through, but the arrow barely stayed in the animal. I believe the sharpness of the broadhead makes ALOT of difference. I think most traditional broadheads are not sharp enough "out of the box" and should be sharpened to a razor edge. Haven't shot an animal with at trade point (yet) but you can bet one thing, it will be sharp.