I find it kind of funny that everyone keeps saying the heavier arrow is deffinetly better for marginal hits because it gets better penetration. Now to me a marginal hit usualy means nothittingthe vitals, as in gut shot, in that ham, paunch. Honestly if I had to shoot an animal anywhere but the vitals. Id rather have the arrow stay in, in hopes of it moving around and hopfully cutting an artery or getting turned and shoved in the vitals or something. The only marginal hit I can think of that would need as much penetration as possible is hitting an animal square in the shoulder bone. From my experience its gonna be pretty hard regardless of arrow weight to get through that shoulder bone. My point, does a heavier arrow that possibly penetrates deeper really help on marginal hits? I dont know.