I've seen a shooter compete one of these at a 600 yard match and do pretty well with it, a Harris bipod and inexpensive scope. It seems to me that this is a much cheaper, easier route than F-Open with all the attendant hardware.
http://www.gunsamerica.com/901539014/REMINGTON_700_308_VARMINT.htm
http://www.gunsamerica.com/901539014/REMINGTON_700_308_VARMINT.htm