I have never paid much attention to which rounds have been chambered before and which are fresh.

I realize bullet setback can occur because I have recently read about it here.

I just never considered it.

Is it really something we all should think about or is it a fluke?

I have chambered and removed ammo from a couple of my semi-autos and I have noticed no set-back changes.

Is the problem prevalent in certain guns or with certain ammo?

.

__________________
Kirk / Spock 2020