Hey bud,

The 6mm PPC round is the world record setting short range bench rest round so In my opinion, there is no better caliber for this style of shooting.
The twist on the barrel is 13.5 twist. The bullets are Barts Custom Ultra Flat Base 68gn these days .Switched away from the Bergers.
I don't measure my velocity with a gauge. I just read the shot deviation for barrel time.
My rounds are seated .005" off the lands.
The PPC round does look a littler long compared to other rounds.