Right on!! My old arrow set up flew pretty good shooting at 15 yards but once I got out to 30 some yards they went goofy on me. It was a combination of form and too weak of spine for me. I shoot a recurve so form and arrow set ups are huge when practicing and shooting. Like Jeff said try doing the longer range shooting/practicing right away to see If It's tiredness or If you really do have some arrow/bow/form Issues.