Just getting my feet wet in long range shooting and was sent a link to this board by a friend. I'm having a 264 Win. Mag. built by Pac-Nor. It will be used with a Savage 12BVSS-S (single shot) action. Going to be 8" twist, 28" long, 3-groove set up for shooting the 140's and up. It will have a muzzle brake and will sport a Leupold 8.5-25x40. The rifle's primary use will be long range PD shooting (trying for 1,000 yard club this summer). I'm also thinking of getting involved in some 1,000 yard competition with it if she shoots well enough. I'm planning to experiment with Retumbo which falls between H-1000 and H-870 on the burn rate chart. Has anyone here experimented with Retumbo in a .264 WM using 140's??? If so, any load info would be greatly appreciated. Thanks in advance.