Shooting a Bowtech Insanity CPXL with your basic 5-inch hunting bow stabilizer, I shot 10 three-shot groups that averaged 4.82 inches--which was on par with most of my other 60-yard groups. Then I screwed on a 10-3/8-inch, 10.5-ounce, Doinker EFDF (doinker.com), and shot 10 more groups at 60. Average size: 2.97 inches. I figured that had to be a fluke, so I shot another 10 groups. They averaged 3.21 inches. I later got similar results with a 12-inch Doinker D.I.S.H. and a 10-inch Bee Stinger Pro Hunter, too (beestinger.com).