Shooting off a Bipod on a Concrete Bench

[Hondo64d]

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?

Harris bipods can be problematic when the legs are fully compressed. The spring that aids in extending the bipod legs can cause some hop, especially on hard surfaces. Extend the legs to at least the first notch and you may have better results.

John