Scorch and hodaka thank you for your in-put on this.
I'll do a search on McGowen barrels.
The rifle is now a 1/2 MOA rifle and if the groups don't get any larger then that I would be happy.
Scorch, another question if you don't mind.
I know there's a lot variables when it comes to accuracy, what kind of accuracy do think a McGowen barrel would produce?