I just came into possession of a beautiful example of a Danish Rolling block. I've found ammo, but it comes in two varieties: 11.7x51 and 11.7x56.
I'm thinking either somebody tells me which one I need or I cast the chamber and measure it.
Anybody care to tell me how to do a chamber cast. I have an ingot of metal for this purpose from Rotometals.
thanks in advance
dale in Louisiana