I called brux barrels today to see if they had any 6mm barrels in stock. they had a HV 31" 6mm blank in a 8.5 twist. I took the barrel as i have been wanting to try them out. Now i am wondering what the heavies bullet i will be able to shoot I am going to chamber this blank for a 6mm dasher, and i am hoping to shoot 105gr berger's. What do you guys think? Is anyone here shooting a 8.5 twit 6mm? Lee