Having fitted my dolphin Trakker bipod to my ftr rifle , the gun doesn't track back to point of impact even though I have 4 bullets touching at 300 yards. I can never seem to see the bullet landing, I am using a sand bag at the rear and don't know what is wrong , is it my technique ? Is it the sand bag , ? would appreciate someone's input on this , the rifle could go left , right , up when the shot is gone off. I have tried pulling back hard and soft on the recoil pad , all seems to make no difference,