I'm looking to make a couple of bullet sizing dies that will operate in a manner similar to the Lee push through dies for sizing my cast bullets. These would be used for sizing my cast bullets down to suit my .38-55 rolling block and Uberti 1885 that both seem to require .377 size boolits.
I've got the Lee push through sizers for .358 and .427 to use for my cast revolver and lever rifle boolits. But they don't make a .377 size.
My plan is to order up some 7/8 threaded rod for the main body just because it's so convenient to go with that as an option. Then I'll bore it for the pass through size and the seating area for a press fitted sizing insert. The sizing insert would be made from drill rod machined close to the final size, then hardened and tempered, press fitted to the threaded outer holder and finally lapped and polished out the last half to full thou to the size I want.
Does that fit in with anything anyone here has done already?