I've only "tested" them on a hog and a deer so far. Small hog, but passed though so fast I thought I missed--never did find the arrow, short blood trail (my buddy did follow up with a Magnus, but he accidently walked up on it and jumped it after it had gone down in about 20 yds). Shot a whitetail earlier this year, too high and too far back (liver shot), it only went maybe 50 yds. Kind of tricky to sharpen at first, I like to hone the needle point off, but over-all a good head. Hope to try out some new Ace Standards I got before the season closes.

Chad