Reply To: 6MM BR or 6MM Dasher?????? › Forums › Reese Bottom Chat Room › 6MM BR or 6MM Dasher?????? › Reply To: 6MM BR or 6MM Dasher?????? July 10, 2014 at 11:25 pm #1642 Wynne EcholsKeymaster I would think either choice would need a 1 in 8 twist barrel for the heavier bullets. WWE