I could likely hit my .355's with a light-weight hammer and not set them again. All of that to say that with the true 9mm die it is best to get lots of neck rigidity. Good day, I reside in S. CA and not long ago purchased my 1st pistol, https://9mmbulletreloading76206.qodsblog.com/37736112/indicators-on-reloading-9mm-ammo-you-should-know