For 9mm ammunition, you must use *smaller pistol primers*. Here are some specific tips and things to consider: ### Primer Sort - *Small Pistol Primer*: This can be the regular primer useful for reloading 9mm ammo. Brand names like CCI, Federal, Winchester, and Remington all make trustworthy compact pistol primers. https://winchester-primers-in-sto50456.blogdigy.com/take-into-consideration-trustworthy-brands-noted-for-excellent-and-dependability-46894293