I have done an overload work up in a Glock 19, and like other 9mm pistols I have tested, it is stronger than the brass.

The stock G19 barrel has feed ramp intrusion to .19".
Most 9mm brass have a .16" web, leaving .03" of thin unsupported case wall over the feed ramp. That causes a bulge with typically 60% more powder than published maximum loads.

Typical 9mm.

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