OK. So I was trying to determine the proper overall length of a boolit for my 9mm. I removed the barrel and did a plunk test with a factory load and it made a distinct metallic plunk. With the powder coated cast boolit the cartridge went plunk but had a more dull thud sound. The case head was flush with the back of the barrel so it looked OK.
Is that a pass because the cartridge free-falls into the chamber and ends where it needs to?
Or is it a fail because it made a dull thud sound?
It also seems to pass the function test - it cycles through the magazine, chamber, and ejects well enough.
This is at 1.130"
I start to get a metallic plunk when the OAL is down around 1.115"