You just have to know your equipment and set them up the way they need to. A good set up should shoot fixed blades perfect. I shoot muzzys, always have, and I'm sighted into 80 yards for elk and they shoot like a dart. No problem grouping what so ever. Never have had a problem with flight ever once things were tuned and set up right. Now would you rather be accurate and blown through the animal at 50 yards or be accurate with a mechanical that sticks in the animal at 50 yards? or better yet how about 20 yards as the origional post states. No way a fixed head wouldn't have gotten complete penatration at the least compaired to 8 inches out of a rage 2blade at 20 yards. Just my 2 cents so back to the origional post. WCL