10MM vs .40 S&W! Hornady Critical Duty Ballistic Gel Test Using The Glock 20 & Glock 22!
This guide details a ballistic gel test comparing 10mm Auto and .40 S&W using Hornady Critical Duty 175gr FlexLock ammunition fired from Glock 20 and Glock 22 pistols, respectively. The test evaluates velocity, penetration, expansion, and weight retention, providing expert insights into the real-world performance of these defensive calibers. The instruction comes from an experienced firearms instructor demonstrating a thorough understanding of ballistic testing methodologies.













