I don't think it is the chrony. I have found that I can only get 2650-2675 FPS out of my 7-08 mountain rifle when using ABs. That is with 42 grains of Varget, which is the max book load (according to Nosler). However, 139 Interlocks (spitzers/flat base) with 41.5 grains hit 2800+ FPS. For...