I don’t think I‘ve ever seen a 1/7 twist .308. I’ve seen a lot of 1/17 twist.308 barrels. Mostly chambered for .30BR.Are you really talking about a 1/17 twist barrel or do you mean a 1/7 twist ? I don't think I have ever seen or heard of a 1/17 twist in 308 win.
I have thought about putting that setup on my 30/378 Weatherby. I’ve got a 13” twist Bartlein and I’m going 4,130 fps with the Nosler 125 now. It would be interesting to see what kind of velocity I could get. I’ll say this about it now. It is not a meat gun. Unless you’re a buzzard or a hog!! But I love it like a fat gal. When you see what I can do!! The biggest grin!! You will have!!I'm thinking of putting a 17 twist 308 together for shooting paper with light 115-125 grain bullets at 100-200 yards? Would this make a pretty accurate combo or not such a good idea?