The test loads were BRASS cases and reloads . I ask what the load was and was told we can not tell you .
If they are brass cases you have to beat out of a clean, new gun, there is
something wrong with the gun. Steel cases don't contract, and may stick.
but brass should slide out easily.
What they told you is BS. The entire purpose of a "proof round" (BTW, the 1, AND ONLY ONE, they put in your new pistol box.) is to demonstrate and verify, beforehand, the performance of the pistol, with a set charge, at a set pressure.
Many times there is specific information provided with the proof round, showing that very information, of which you requested. IMO, these guys are all effed up. But what do I know? I only purchase NIB guns
from reputable manufacturers, a few times a year. Maybe somebody with more experience can help you out.