Try the hornady match grade 139gr bullets and you'll see an even better group. Experiment with that forend piece. See if you can glass bed it. If that makes it worse you can alway grind it back out. One thing to note is how tight you have the screw. You must make sure it is the same all the time. To tight and things get worse. To loose, same thing. Believe it or not I had a sling swivel that messed up my groups. Above all.........have fun. Remember a bad gun is not like a bad dog. You can't shoot it to make it go away.