Shane,not trying to hijack your thread but found what you have done interesting as i am using the 130TSX in the 300WSM for a hunt in Old Mex in 2 weeks. With R-15 i am getting 3400fps on the nose and sub moa groups. I run out of useable energy at 550yds (approx.1200ft/lbs). I can get more speed but i am satisfied with speed and accuracy as is. I found that your 308 getting 3200 is very interesting. Have you compared recoil with a typical 168BT? The 300 with a #3 tube and Mcmillan gelcoat is very tolerable with the 130.
Bill