First, I think the instructions say to turn the die an eighth of a turn (not an eighth of an inch) after it touches the shell holder.
I didn't say the instructions said 1/8 of an inch, but 1/8 to 1/4 further down
. I mistakenly adjusted the die 1/8 of an inch for some unknown reason.
This is my first AR platform rifle, so please forgive my ignorance here…but are there any safety issues with loading a magazine of these rounds and pulling the charging handle to see if there are any chambering issues?