For 9mm ammunition, it is best to use *compact pistol primers*. Here are a few specific recommendations and considerations:### Primer Variety- *Tiny Pistol Primer*: Here is the typical primer employed for reloading 9mm ammo. Manufacturers like CCI, Federal, Winchester, and Remington all generate trusted smaller pistol primers.### Variants- *Common

Using a small rifle primer in pistol ammunition is generally not recommended. Here are some important points to consider:### Differences in Design1. *Primer Composition*: Small rifle primers typically have a harder cup than small pistol primers, designed to withstand higher pressures associated with rifle cartridges. This can lead to inconsistent i