It shows a pellet that has been fired and clearly shows what was mentioned by chris and nurek...i.e. the pellet skirt expanding

No mention of the pellet sealing in the grooves, just expanding...not sure how you can say that pellet has been merely rodded?

Try this one for size

https://photos.app.goo.gl/zvz5gW6sVvQyGapw8

I followed your threads on the other channel with great interest but I think you have maybe read too much into the statements in this thread, I agree with almost all the conclusions you came to and admire the way you got there.

I was messing with barrel lead in shape after I had read the article where the photos came from.