Re: 6.5 Remington Magnum
C'boy300 -- Jim See at Center Shot Rifles is building mine, check out his site, it's a good one.
I've got two 260's at present, a Rem & a Savage LRPV. Rem is for hunting & sports a Kreiger #5 contour twisted 1 in 9; Savage wears a McGowen 28 inch bull twisted 1 in 8 and shoots in the teens with 140 MK's and H4350.
My 6.5 mag will be pretty heavy wearin' a 28 inch MTU-contour Brux & a NF so I'm thinkin' recoil will be negligible, certainly not 2X unless we're talkin' hunter weight - say 9 pounds or so. Don't plan on shootin' hot loads unless it's beyond 1K. It'll be fun trying!
Rich