Re: Luck with .30-378?
Boy that sounds familiar!
Anyway, if youre using a bipod or even a rest of sorts on the fore end of the stock, you will need to grind the lip off of the end of the stock under the barrel. Chances are, if you sit the rifle on a bench with a bipod, you most likely cant slide a dollar bill between the barrel and stock. 2nd, try RL-25. That was the only powder I could get to shoot worth a crap in mine (was being the operative.)
If I remember right, 107 grains of RL-25 under the Barnes XBT 180 shot decent at about 3450 FPS.
Long range shooting is a process that ends with a result. Once you start to focus on the result (where the shot goes, how big the group is, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.