kbacon is rightif inserts are tweaked even the slightest bit. There is no telling where your broadheads will end up. Before I got my bow tuned to perfection I had similar troubles, spend the money and take the bow to a pro and get it tuned right. If this is not an option sometimes I found by
positioning the head differently you can get a little more accuracy.Line up blades with vane try a shot, then move to center of vane you get the point good luck hope all works out