Fit, function and safety...
Those are the reasons for the plunk test. As a competitor I would plunk every single round I fired in competition. A jam takes you out of the running at the very least.
And safety is paramount.
The rule on every range I have ever been on is that if you see a problem...stop.
If the point of the plunk test is to find a problem before it can occur, what is the point of firing rounds when you know that a problem exists?
But I'm glad you're ok...
Springfield makes a good product but some issues will slip through... but nothing has been determined here as to whether it is an issue with the gun or the ammo.
Guessing doesn't count.