I recently purchased a 10mm pistol. I was looking for dies and came across the Lyman 4 die set (Sizing Die, Neck Expanding M-Die, Bullet Seating Die, and Taper Crimp Die). For my 9mm which is what I have been reloading i have a three die set (Sizer Die with Decapping Unit, Expander Die, and a Seater Die for seating and crimping the bullet). I am a little apprehensive about reloading a high power round. My question is: would yall recommend the 4th die for 10mm rounds or is a three die setup sufficient?