It was two different bows and I'm not sure why they were noisy. Both guys were shooting aluminums at over 500 grains. There was no quiver, no peep or any accessory that I thought would be the problem. I pretty good a getting a bow quiet, but I didn't try on theirs. I just looked them over and saw nothing obvious that would cause the noise. Both bows sounded identical, so I attributed it to the differences that particular cam caused. Maybe it was just coincidence.