How does yours shoot, Mike? All of these I've ever seen shot really well. I'm sure you're aware that 600 and 660 actions were very popular to use to build bench rest rifles. I knew a guy in Missouri who had such a rifle using a cartridge of his own design and a Shilen barrel that would regularly shoot sub quarter inch groups at 100 yards. The first time I saw him do this I was totally dumfounded. Of course, he was shooting in a tunnel, but a quarter inch is a quarter inch, tunnel or no tunnel.