Using a small rifle primer in pistol ammunition is mostly not suggested. Below are a few important factors to consider: ### Discrepancies in Style and design 1. *Primer Composition*: Small rifle primers ordinarily Use a harder cup than small pistol primers, intended to resist greater pressures related to rifle cartridges. https://winchesterlargepistolprim63718.webbuzzfeed.com/31971147/utilizing-a-compact-rifle-primer-in-pistol-ammunition-is-usually-not-recommended