Using a small rifle primer in pistol ammunition is mostly not recommended. Below are a few crucial factors to consider: ### Variations in Layout 1. *Primer Composition*: Small rifle primers normally have a harder cup than small pistol primers, built to face up to better pressures associated with rifle cartridges. https://winchester-41-small-rifle03826.blogzag.com/75483744/utilizing-a-smaller-rifle-primer-in-pistol-ammunition-is-normally-not-recommended