Empty case necks dented?

[Chance-dg]

Thanks for the explanation and help.....I have turned to gas block to max pressure and have a couple of H1 and H2 buffers I am now playing with to get the rifle dialed in. I am still going to shorten the plunger spring a coil or 2 to eliminate the slight case mouth denting issue completely. I am beginning to really like this SA gas block for its adjustment range.