Ok I have a barrel i bought off of ebay when speedy gonzalez was selling off a truck load of stuff. It is currently a 6mm/22-250 I rented the reamer from 4d rentals I would like to see about seting it back as a 6 dasher but am having trouble figuring out how far Id HAVE to go. this current set up has about 60 rds down it and i dont need any extra cut off to account for wear, matter of factly if i HAVE to take much over 1/2'' it cant be done. Thanks for any help