I had a flex problem with my Stevens 200 stock. I stiffened it by bonding the barrel to the stock at the forend with black automotive silicon. First I opened the tip area up a bit, cleaned the barrel and the stock with alcohol and put a thick bead of black silicon across the forend and then I carefully but the barreled action into the stock. Works just fine. I did mine to stabilize the stock/barrel together when carrying a sling. I am sure this will work for bipod shooters also. After doing this my 22-250 will put it's favorite load into .6 for 3 shots and it maintains zero perfectly.