I picked up a used 4 cavity 358429 lyman mould today. It looks to be in great shape BUT I do have a question. How much of a gap should there be when lifting up on the sprue plate? When I first got it it had 1/16 + inch gap on it. I tightened the screw and can just about eliminate any gap at all. Is there a technique to adjusting the sprue plate?
Thanks