Yeah. I did the inletting for the 338Lapua accurate mag DBM in a Choate Tactical stock. It came out clean, and now I can run super long COL's in my 280Rem :D . But really, I dont know what difference the mag hole in the bottom of the receiver would make between the SF and CF SA models. I think they are probably so close that it won't matter too much with the detachable mag. Hopefully they will be doing them for the CF and the SF SA's.