For 9mm ammunition, you need to use *little pistol primers*. Below are a few particular recommendations and things to consider: ### Primer Kind - *Smaller Pistol Primer*: This is the common primer useful for reloading 9mm ammo. Makes like CCI, Federal, Winchester, and Remington all produce reputable smaller pistol primers. https://beckettgigee.collectblogs.com/76658317/consider-highly-regarded-brands-known-for-high-quality-and-reliability