Using a compact rifle primer in pistol ammunition is usually not encouraged. Below are a few essential points to look at: ### Variations in Layout 1. *Primer Composition*: Tiny rifle primers generally Use a more difficult cup than modest pistol primers, made to withstand larger pressures affiliated with rifle cartridges. https://fernandozwrlf.tinyblogging.com/employing-a-compact-rifle-primer-in-pistol-ammunition-is-usually-not-suggested-75153556