OK, so I finally tracked down some pins and sized my Zouave and a round ball twist 58 barrel that I had bobby hoyt make out of a roached New Englander barrel. The .580 pin just barely goes maybe a quarter of the way into the Zouave barrel which suggests to me that it is a .5795 or .580" barrel. The New Englander barrel appears to be .582." I am planning to start working with the Lyman Blue and Gray target minie. What would you size minies for these barrels at? I was thinking maybe .578 for the Zouave and .581 for the New Englander?