Everything I can get my hands on!
I load my 5.7 with Hornady dies on a Lee Challenger press. Most of my other handgun rounds are done a Dillon 550 . I also have rcbs and keep dies for 5.7 but got the best results with the HornadyGotta start getting EQ for my new range toy.
I've been lurking the FiveseveNForum and it looks like the general feel is that Lee Precision was making a functional die set but changed something and now isn't. RCBS dies are 50/50 hit-or-miss. Hornady seems to get good marks and the custom die makers CH4D get top grade. I'm looking seriously at the Hornady but I've also by eyeballing the Lyman dies. I only see one user mention that he's using it, but he likes it. "BUFFMAN" has posted a lot of YooToob content on the 5.7 which seems to pass community muster so I guess he speaks with some authority. Looks like "panzier"/Elite Ammunition, another accepted authority on that board, hasn't tried it.
Any experience here using Lyman dies?
Peace favor your sword,