My is early 80's vintage 1B in .280 Rem. Right out of the box it was giving pretty much full-choke patterns at 100 yards. After bedding the area where the forearm screw goes in, tinkering with screw tightness, and messing with seating depth it is now shooting 1-1.25 3 shot groups with 140 Sierra GK and 175 Speer GS.
