Just a quick post to let everyone that my #### is still there. I took Hungry's knowledge and applied it to my Norc, and yep as I expected. tighter rifle =tighter groups. Using surplus ammo from milarm I got tight just over 1 inch groups at 100 through stock Norc sights. 3 second ping from just shimming the block and pinning. Going to shave my piston rod next and get a better oprod. When I get back I am going to glass the stock and scope her and get a bipod. Should be a good moose shooter when I'm done. hehehehe....... Can't sing Hungry's praises enough, thanks again PATRICIA!!