I am trying to shoot my 308 off a Harris bipod an a concrete bench and not having good results. I use a wrap around grip & pull the rifle back hard into the shoulder. My left hand is between the small sand bag & stock to adjust the elevation. So, I guess that the rifle is in 'free recoil' since I am not pulling down on the foregrip. My groups are around 1.75 moa for 5 shots. I usually have a flier as the 4 shot groups are at 1 moa. I the rifle is capable of .75 moa, but I am not getting it. As a comparison, when I shoot my AR15, I am consistenly under .75 moa shooting in a similar fashion. Should I grip the foregrip with my left hand to eliminate the free recoil?