THAT is incredible velocity, wish I could duplicate those numbers. I have ran just about every powder in a 6.5 Max with the 123 AH and regardless of powder used, I am seeing significant pressure at roughly 3200. I do only have 22" of a Proof Carbon barrel but certainly 2" would not equate to 300 fps. What brand barrel do you run?6.5 Sherman Max Seriously though, I love mine, and that length (26" finished) would suite it pretty well for a fast punch. Clymr stock shouldn't look bad if the brake isn't too long. For more traditional, go PRC. I don't like to go less than a PRC for elk use. Shorten barrel to 24" if desired. Mine runs the 123 AH at 3,500 with H1000 with a 24" tube. Pretty sure we could go faster if we played with other options.