if thats the group size you are getting i would call savage for some warranty work or somewhere i recall reading a guy had to take his action out and found that a screw was too long and was hitting his barre i think? there is a specific way to re-assemble the action and i am sure someone will post that link. but after he ground a screw down and put it all back together, his groups dropped to what they should have been. i read way too much stuff to recall the specifics and i dont have an accustock so i dont commit as much data regarding the accustock to memory. i would not think ammo would cause that big of a group, but i could be wrong. anyway taking the action out is free and a good place to start. maybe it was a sling stud screw?