Re: need help
I'm not too big on shooting off the ground with a bi-pod, at least not at long range.
I have shot thousands of rounds while using a bi-pod. One thing that I've noticed is that the rifle does not always recoil consistently when the bi-pod feet drag on grass, ground or whatever. To determine if this is the cause of your problem, I would shoot the same set-up off a stable, makeshift bench, or switch to conventional sandbags and see if that eliminates the problem.
Just one possibility - Good luck