For 9mm ammunition, it is best to use *smaller pistol primers*. Below are a few particular tips and criteria: ### Primer Form - *Smaller Pistol Primer*: This can be the typical primer employed for reloading 9mm ammo. Manufacturers like CCI, Federal, Winchester, and Remington all generate trustworthy little pistol primers. https://josuererbm.liberty-blog.com/31540527/look-at-respected-brands-noted-for-good-quality-and-reliability