Employing a compact rifle primer in pistol ammunition is usually not advised. Here are a few critical factors to look at: ### Variances in Structure 1. *Primer Composition*: Small rifle primers commonly Use a more difficult cup than little pistol primers, designed to resist greater pressures associated with rifle cartridges. https://juliusvmhde.techionblog.com/31446101/using-a-little-rifle-primer-in-pistol-ammunition-is-mostly-not-suggested