Hey guys, I have just been gifted a 1908 build M92 in 32/20, it's been rebarreled sometime between '08 and '60 but everything else is original. I have gathered all my components together and cast up some Lyman 3118's which dropped at .314 with my mix, a good dose of White Label lube, I'm using 4.0 gr of AP70 which is about Unique equivalent. So I managed to get down to the range on the weekend to see how it all goes and was extremely happy with a good 3" group at 50yds and my eyes, a dozen or so patches with Ed's red and the bore was shiny as can be.
So the question is, this is the first time I have played with a 32/20 and was "surprised" at the shape of the case once fired, it could almost have been a straight walled cartridge, there was only 0.004" difference between the O.D. of the case mouth and base in front of the rim on once fired cases (Starline). Is this normal?? I haven't made a chamber cast yet but seems I need to just to see what I have the chamber cut to. I would have thought that it would still retain some of the pre fired shape, what little taper there is but looks nothing like a 32/20, almost a long 310 cadet.
So if the brains trust here can shed some light, I am sure Ric and Jeff will pipe in. cheers