Using a little rifle primer in pistol ammunition is normally not advised. Below are a few important points to look at: ### Variations in Layout one. *Primer Composition*: Little rifle primers generally have a more difficult cup than tiny pistol primers, designed to withstand higher pressures related to rifle cartridges. https://winchesterprimerseurope23567.blogrelation.com/37509479/using-a-little-rifle-primer-in-pistol-ammunition-is-mostly-not-advisable