Hi Daryl

, I posted about my 12 gauge regulated for the Brenneke Black Magic but I would like to try Round ball in it. What size would be best, how much under bore. Should it be patched in some way? I don't think getting a round ball to regulate would be too difficult being its weight is approx 550gr compared 600gr to Brenneke. Also do you see advantage to either kind of crimp with round ball.