I am thinking about building the ultimate calling/long range rifle, something that is handy yet insane accuracy for long shots, I am wanting to do a 8 twist 5 contour barrel in 243ai. I am wanting to use a BAT varmint repeater action. the thing I can't decide is if I should get the built in picatinny rail or not, the pros are it adds action stiffness and a good solid base to mount a scope, the cons is it adds quite a bit of expense, weight and I am not sure how easy it is to top load shells. is the extra action stiffness that important?? also if anyone has any pictures of the bolt face I would greatly appreciate it.