If you want more solid proof download "the archery program" put a mathews DXT signle cam then a monster XLR8 duel cam in with all the same set ups arrows shooting the same # and fps there is more than 2 inches differance drop at 20 yds 12 more ftlbs of KE, 30fps volocity.you tell me there is not a differance when using cheap charts.check this for yourself before you post against me again.