Yes, I have done many of them. Generally its not worth the cost on a 700, unless you just want the sweetest 700 you can get. Mostly I do it to custom actions that where not designed to be timed like Kelbly's. Due to the work involved, its not cheap. Unless your smith is recutting the cocking cam helix to do it right, I'd learn to live with the cock on close.
Its very similar to a rem 700, cocking helix has to be re cut.