I have a remington aac with a fsc30 brake in it. ive got a 3.5-10x40 leupy and heres the issue. my scope adjustments at 100 years are not consistent enough for a group. im thinking its the brake, and i hope its not because damn....it works great. im shooting only hornady a-maz 168 bthp. maybe someone could provide a ballistics chart for the load and a 20" barrel? thanks guys