9x21 reloading question

Can you reload 9x21 using 9x19 dies, or 38 Super dies. same shell holder or bullets. Is there any commonality with a 38 Super. 
Thanks
Rush

RCBS says the same dies as 9mm Luger.  

https://www.rcbs.com/dies-%26-shell-holders/9mm-luger-reloading-essentials/9mm-luger-9x21%2F9x23-3-die-carbide-taper-crimp-set---group-b---popular-pistol-cartridges/16-20515.html

9x21 is the longer brother of 9x19. Most modern dies are marked 9x19, 9x21, 9x23
A look at cartridge drawing, shown in almost every Reloading manual will show that the case head of those three cartridges is just a hair smaller than 40S&W, while 38 Super case head is almost the same as 223.
If you liad COL long, you can do very well with 9x21.