55 Bergers in 20 BR what powder charge?

[65WSM]

I bought 2K of the 55 Bergers in .204 when they became available. I only this week completed a rifle in 20 BR to shoot them. It has 28 inches of 8 twist. (I know that Berger recommends 7 twist but only PacNor will make one).

I need some starting charges with VV-540, Win 760, R-17, IMR 4350, Hunter, etc.

 

[rickiesrevenge]

I use varget in mine with 55's. I don't remember the exact charge but its about 29gr.

Aaron