alright heres the lowdown. I do not know much about building your own rifles or whatnot I usually just point my rifle at the deer and pull the trigger. Well I just bought a savage 10 heavy barrel (tactical) rifle and am looking for a new stock. They said to measure the distance between the 2 reciever screws. Well I dont even know what 2 screws those are. then they asked if its centerfeed which I am quessing is the oposite to staggered? Just kind of confusing??? serial # is G831543 if this will help????