No pressure, no harm done !!
How many rings did you get in the barrel as you pushed that obstruction through?
When I realized what had happened, I check the barrel and actually found no rings or damage. I suspect it was because I actually did not create any excess pressures. The next bullet just pushed the casing cylinder out and into the target. I still have what's left of it. ....
Be Safe !!!
'Fundamental truths' are easy to recognize because they are verified daily through simple observation and thus, require no testing.