I don’t believe ANY state has passed this useless balistic test. Pins and barrels can and are changed.
This is more a quality control issue I believe.
Before we start assuming or this turns into a “conditioning” (see frog in boiling water) to get the sheep used to the balistic dna test we have to talk to someone who actually knows.
(kind of like that BS UK tv detector to force people to pay their tv ownership tax)
I did a little research - Maryland, New York, and Connecticut require test firing. California requires microstamping (somehow, identifying numbers are stamped on the casing when the weapon is fired - I assume by etching the numbers somewhere in the chamber).