I had mine stippled and it did not change the stiffness. You can still see some of the original texture is some places that shows it was not done too deep. I have seen some that are too deep that could create an issue. I would/will do it again.
I use to RCBS loading blocks(holds 80). Sorts with primer side down(95% will fall primer side down). Then I put the other one on top and flip it over to be able to pick out the military brass.