Smyth Busters: Can You Interchange Rifle & Pistol Primers?
This video from Brownells experts Caleb and Steve addresses the common reloading myth of interchanging rifle and pistol primers. They explain the critical differences in primer cup thickness and height, detailing why using pistol primers in high-pressure rifle cartridges like the .223 is dangerous due to insufficient pressure containment. Conversely, they discuss how small rifle primers can sometimes be used in high-pressure pistol loads if the firearm's mainspring is robust enough, and why certain high-pressure cartridges like the .454 Casull are designed for rifle primers. The experts strongly advise consulting reloading manuals for safe and reliable practices, emphasizing that while some interchangeability might be technically possible with extensive load development, it's generally a risky endeavor.











