Re: Cost of putting on a M40A1 profile barrel.
Yeah, I plan for 600 as well.
That being said, GAP hung my last tube on an action for me. It was an especially long barrel (34 inches) which adds a little price to a blank and I provided the reamer and gauges, and the smith work was 355. That was a crown, thread, chamber, and shipping.
Came out at 700 bones for that particular barrel, which was a special deal because of the length. I doubt you would be any higher than that. Lower, certainly. Grab a Brux at 275 bucks and there are plenty of smiths that will do it cheaper. Will any do it better?? Probably not.
Plan for 600 to get it done by a reputable smith with a proven barrel producer.