What is Bullet Setback? How Bad is it?
This video from The VSO Gun Channel explains the phenomenon of bullet setback, where repeatedly chambering a round can cause the bullet to be pushed deeper into the casing. Through a practical demonstration using Fiocchi 158-grain 9mm ammunition, the instructor shows how this setback occurs over multiple chamberings, measuring the change in bullet length. While it took 100 repetitions to achieve significant setback in factory ammunition, the video emphasizes that this can happen faster with reloads and highlights the importance of visual inspection for duty or concealed carry rounds to ensure reliability.













