I've been bare shaft tuning compound bows since the late 70's for hunting and target work. If the bare shaft is still going straight in to point of impact at 20yds, you're pretty much there for targets and mechanicals. BH tuning is still necessary for fixed heads. The shaft starts to spin up after about 15-20', or you need more offset on the fletch. Once the shaft is spinning, the fixed blade broadhead stops steering and goes where the shaft is pointed. The point of BH tuning is to have an arrow that flies where it's pointed until spin takes over. Some big fixed heads of the past were nearly impossible to to tune for on a very fast arrow.
