For 9mm ammunition, it is best to use *small pistol primers*. Here are a few certain recommendations and factors: ### Primer Sort - *Tiny Pistol Primer*: This is actually the regular primer used for reloading 9mm ammo. Brands like CCI, Federal, Winchester, and Remington all make reliable small pistol primers. https://winchester-primers-uk49371.targetblogs.com/31917671/take-into-consideration-highly-regarded-brand-names-known-for-top-quality-and-reliability