So long story short, I'm attempting to form 310 cadet brass (thin rimmed) from 7.62 nagant brass. Easy enough right? Well... I've acquired a set of 310 dies, originally made by NDFS (North Devon Firearm Service) in the UK. They look great....BUT, after disassembling and cleaning, etc. the sizing/depriming die has a .250dia neck sizing button in it?? Obviously that isn't right...so I removed it (didn't matter, it didn't touch the brass anyway) and sized a couple cases just to see what I actually have.
Ended up with:
.388 rim diameter
.042 rim thickness
.352 base dimeter
.314 neck od
.285 neck id
length, as I trimmed to, is 1.120.
So....my questions are: Do I have some weird wildcat 310 cadet dies? Do I have the correct die body with the incorrect neck sizing button? <obviously the button is wrong, but is the die body correct?>. And...any suggestions where I might find a correct neck sizing button?
Unfortunately don't have the rifle in hand yet....but trying to get ahead of brass supply, and maybe even be able to supply brass for others at a reasonable price.
Any advice welcome and appreciated!
Trails..