For 9mm ammunition, it is best to use *smaller pistol primers*. Here are a few specific recommendations and issues: ### Primer Style - *Little Pistol Primer*: This can be the typical primer useful for reloading 9mm ammo. Makes like CCI, Federal, Winchester, and Remington all produce reliable small pistol primers. https://ericklmmit.ka-blogs.com/84794975/think-about-dependable-brands-known-for-high-quality-and-trustworthiness