I managed to get a 9.3 x 62 FCD apart into the two main pieces. I bought a holder that will accept a dremel tool into tool post holder on my lathe. I intend to shorten the outer case (does not appear as critical), then to shorten the inner crimping part to work with 9.3x57 - which are not offered by Lee. Was going pretty much in circles because I could not find dimensions for original 9.3x57 chamber or cartridge. I had set it aside for a while - about ready to try to come up with a dimension again. As mentioned - is a "one way street" - once cut, will not work with original case, again, unless you turn a spacer to take up what you cut off, plus the kerf. I do believe that the same sequence occurs with the Lee collet dies, that you are asking about. If you have to pay someone to do that figuring and that work, then likely MUCH cheaper to buy what you need. My impression was that the die body and / or the collet body is hardened spring steel - I did not think that it could be cut with a hack saw - let alone accurately cut that way. I do not know, but I would think a Lee collet sizing die for 308 Win has to be pretty much readily available?