Utilizing a small rifle primer in pistol ammunition is generally not advisable. Below are a few important points to take into consideration: ### Dissimilarities in Design one. *Primer Composition*: Small rifle primers typically have a harder cup than compact pistol primers, created to resist greater pressures linked to rifle cartridges. https://winchester-large-pistol-p30612.webbuzzfeed.com/31936315/utilizing-a-small-rifle-primer-in-pistol-ammunition-is-generally-not-advised