Hi All! I'm looking to rebarrel a mid-70's model 700 in .308 and would like some input. What I'd like to know is what is the best twist rate for the .308? I know that the faster twists stabilize the larger bullets, but does that adversly affect the smaller bullets? I'd like to be able to play with the full range of bullet weights. I'd also like to play with long range (800-1000 yards) but not necessarily to the point of being the focus of this rifle. Also, what contour/length would be best for a mountain hunting rifle? Has anyone had any experience with the 5R rifling? Is there any advantage to it (I see Lilja offers a 3 groove- same question)? Thanks for the help, guys, I really appreciate it!