Miller,
You are correct, I did think you were talking about one gun. I understand the "steps" between the plug gauges used to measure bore diameter was .1mm or about .004". Even though it was almost 156.14 gauge, if the plug wouldn't quite fit in it would be marked the next size down, even though it wasn't as close to the actual size. We have to remember the time the system was formulated, though. Your gun was intended to use .318" bullets, but you can use the 32 Win. Spec. .321 bullets in hand loading and I hear good things about the new Flex Tip bullets. I'm pretty sure Larry Schuknecht at Dutchmann Wood Works can make you a new forearm( incl. iron)for the Sauer. Do you know who actually made the Miller & Val Greiss? If it was Meffert, I have a parts drilling( frame cracked & Welded) that has two good locks with matching hammers. It also has a good forearm, but it wouldn't do you any good.
Mike

Last edited by Der Ami; 09/13/19 04:53 PM.