I would have to argree with others who said get some feathers on those arrows, or at the very least, some aggressive helical 4-5" vanes. I shoot 3" vanetecs, but that is with a realease and drop away rest. I was shooting a Whisker Biscuit last year, and had problems similar to what you are describing, though they were off some at 20 too. When I was test shooting broadheads to check tune last year, the Phantoms were twice as far away from my field pts. at all ranges, maybe more at 40 yds. than Slick Tricks and regular Muzzys. You can get them to fly well, but the bow needs to be tuned very well, and a little more fletch control is going to be a big help. Also, my experience with the Whisker Biscuit is that if it is off by a little, you won't get the best flight, especially with broadheads. You can get low arrows when your rest is too low (nock point too high), but also when the rest is too high, as greater drag seems to cause the arrow point to be pulled down as the fletch end of the arrow goes through the bristles. It can be a very fine line between these two extremes where the flight with broadheads is really good. Also, if the biscuit is not parallel to the string, bu leans slightly forward, it can cause broadheads to shoot low. Sorry I can't help more. I did shoot a little with fingers and the WB, but I didn't stay at it for too long.