I have been able to get some pretty big broadheads to shoot well at speeds over 260. I personaly don't feel that broadheads have to hit to the same point of aim as fixed blade heads, but it is nice. I saw that Len spoke about paper tuning with each arrow. I do this for every one of my hunting arrows. I shoot each possible hunting arrrow with a field point first. making sure I get proper results at 3,8 and 15'. I then attached my broadhads, spin test each one to make sure I don't have any wobble and then and go to the range. Most often by taking these steps I will have 8 to 10 arrows that shoot broadheads well. This is out of a dozen aluminum shafts. With the lower grade carbons it shrinks to 6 to 7 arrows, and with the better grade carbons and Acc's it moves back to the 8 to 10 range. For a simple look at broadhead tuning check out my site www.broadheadtests.com and go to the tuning section. It should help some as well.