I have a quantity of Reloder 10X I got for my 204 Ruger. Right on the front of the container in big letters it says "Excellent for benchrest cartridges" but I can't find any load data for it and the 6br, even from Alliant, the manufacturer. Has anyone used this powder in the 6br, and what would be a good starting point for 107gr Sierra match kings in an 8 twist barrel.