For 9mm ammunition, you should use *smaller pistol primers*. Below are a few specific recommendations and considerations: ### Primer Type - *Small Pistol Primer*: Here is the standard primer useful for reloading 9mm ammo. Makes like CCI, Federal, Winchester, and Remington all make trustworthy little pistol primers. ### Variants - https://winchester-250-magnum-pri56789.dbblog.net/4700192/take-into-account-respected-manufacturers-known-for-quality-and-trustworthiness