Some dies sets allow for total reloading with three dies. Others may demand a fourth die for the taper crimp. Taper crimping, rather than roll crimping, should really generally be completed with the 9mm. The problem with reloading the 9mm would be the tapered case. Given that I pick up https://9mmprojectile55431.dm-blog.com/37653553/details-fiction-and-reloading-9mm