Using a smaller rifle primer in pistol ammunition is generally not recommended. Here are a few significant details to think about: ### Distinctions in Layout 1. *Primer Composition*: Tiny rifle primers commonly Use a more durable cup than smaller pistol primers, intended to resist increased pressures connected to rifle cartridges. https://winchesterlargerifleprime48260.blogzet.com/utilizing-a-smaller-rifle-primer-in-pistol-ammunition-is-generally-not-advisable-46286642