I agree, you are underspined, so long as you are tuned.... I just switched from 115 gr BH this year to 100 GR and did not even think about my spine. I bought a dozen 400 Easton epics (was shooting 500;s)and went out and thru darts again. Its amazing what little things make big differences.... No doubt under spined. Shoot thru paper and see the difference. Try a heavier arrow before buying as i did and it will tell you.