I shoot a 27 1/2 draw Mathews dxt @ 64# and my arrows are only 26" long and I get about 275 fps with this setup. The length of the arrow might be you problem. I shoot Easton Axis 400's with 3" Norway Fusion vanes and 100 gr. broadheads or field tip. The premium arrows and vanes are well worth the extra money. I have zero problems with arrow flight. Their are so many little things that affect arrow flight, your rest, your release, your string etc. You might want go to a good archery pro shop for assistance. Jim