As 25-20 brass as as scarce as the ammo is, I would like to form my own from 32-20. There is a lot of good info out there, but not exact dies that are being used. I know many recommend using RCBS 25-20 die set, but also have seen need form/trim die but does not give a die number. Can anyone give me the exact dies they use to do this. Also, will 25-20 die set reform 218 bee or are other dies needed also? Thanks for reading & looking forward to your reply.

Depending on the brass Aneal first is a good idea too. Starline seems to need it most.  Then trim, de-burr outside, chamfer inside.  You probably knew that but just in case

You can get form and trim dies from CH-4D too

Boats

I have made 25-20 out of 32-20 Win brass. It was easy with the right amount of imperial die wax, just with reg 32-20 fls die. even easier to make 218 out of 25-50 . Brass I used was pliable