As with BB. I just found this site after a Google check concerning Mark X actions...
I just purchased a rifle yesterday that I have looked at for a year or more. It was a 7mm Rem Mag with the Mark X action, bedded and floated Douglas XX air gauged/fluted & SS barrel, a Timney trigger, a High Tech Specialty fiberglass stock fully bedded and floated stock, with one inch Redfield rings and bases. I think it didn't sell because of the stock -- it was scratched and beat-up somewhat. I've already taken care of that with Fiber-Fill and several coats of Brownell's AlumaHyde paint...
After forty plus years of shooting, hunting, and trap work, this is what I'd call my first custom rifle, and I think after researching this and a couple other sites that the $425.00 price out-the-door was quite reasonable. FWIW, that barrel cleans up very well as do my factory lapped barrels. Now, if it shoots, I'll be quite happy; if it doesn't, well.....
Thanks for the great forum. I'm certain I'll be back again...