I have been shooting a 6BR Savage F-class (8" twist) and a custom 6XC, and I am going to test the 6 Dasher in the near future.
The 6XC's best load is 39.5 grains of H4350 pushing a 105 Berger. I have settled on this as my "go-to" load.
The 6 BR is a little more problematic, but it seems to like Varget with the 107 Sierra or 105 Berger. My problem with Varget is getting the velocity high enough for long range. It shoots about 2750 with either bullet.
The lack of velocity of the 6 BR has led me to try the 6 Dasher. I am in the process of getting Mr. Lonnie Hummel of Hornady to make me some dies, and Billy Stevens to chamber it for me. I plan to chamber two barrels....a 13.2 twist Rock Creek and a 8-twist Krieger for this project.
Does anyone have any Dasher pet loads that they would share? Thanks, James Mock