FAQ - 10 (Case Bulge)

Published on March 29, 2010
Duration: 2:58

Hickok45 addresses the common issue of case bulges in .40 S&W and 10mm brass, particularly from Glock pistols. He demonstrates how Glock chambers' looser tolerances can cause this expansion near the base. Despite online concerns, he shares over a decade of personal experience reloading .40 S&W from a Glock 23 without incident, suggesting the perceived risks are often exaggerated.

Quick Summary

Glock pistol chambers, especially for .40 S&W and 10mm, are known to be slightly looser, which can lead to case bulges near the base of fired brass. Despite online concerns, Hickok45 reloaded .40 S&W from a Glock 23 for over 10 years without issues.

Chapters

  1. 00:00Intro: .40 S&W Reloading & Dies
  2. 00:45Demonstrating Glock Case Bulge (.40 & 10mm)
  3. 01:35Safety: The .40 Caliber Scare & Personal Experience

Frequently Asked Questions

Why do .40 caliber Glock cases bulge?

Glock pistol chambers, particularly for .40 S&W and 10mm, are often designed with slightly looser tolerances. This can result in the cartridge case expanding or 'bulging' near the base after firing due to the pressure exerted against the chamber walls.

Is reloading .40 S&W from a Glock safe?

Based on Hickok45's decade-plus experience reloading .40 S&W from a Glock 23 without issues, the risks often discussed online appear exaggerated. While bulged brass can occur, it doesn't necessarily equate to unsafe conditions if proper reloading practices are followed.

What causes bulged brass in reloading?

Bulged brass typically occurs when the firearm's chamber is slightly larger than the cartridge, or due to specific chamber designs like those found in some Glocks. The pressure of firing causes the unsupported case head area to expand outwards against the chamber walls.

Can bulged .40 S&W brass be reloaded?

Yes, bulged .40 S&W brass can often be reloaded, especially if the bulge is minor and originates from a Glock. Using a full-length resizing die during the reloading process is usually sufficient to bring the case back to standard dimensions.

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