In my haste to start casting boolets (.44 mag) I ordered a Lee90227 6 cavity mold , 310 gr. Now I see the base diameter is smaller so I am guessing that is for a gas check. The boolets measure .430 and the base is .400.
Crimeny.
Do I need to use gc's on these? I did not want to size the boolets. What are my options? I will waller that base out if I have to...