Not sure if it is still the case but a while back the CM Shilen tubes were not finish lapped. Not sure I would want to take the chance on seeing how it fouls if that's still the case.
In the current stable of custom rifles I have Mullerworks, Rock, Brux, Shilen, Douglas, Lilja, McGowen and Bartlein tubes represented. My Shilen (1-9" .264) is a fine shooter but in my experience, nothing coppers less and shoots better groups right out of the gate than the Mullers. I have both button and cut rifled tubes from Dan and all are simply spectacular.
You didn't say what caliber or specs you are after but take a look at Bugholes.com and if they have what you are after, buy once...cry once.
