Just an hour ago I pulled all the Tula 9mm brass cases out of
the range brass my brother gave me.
When I went to de-prime the cases they were a lot harder to do
than the other mixed cases. Had to add more case lube, just to
be on the safe side.

They must work ok, since he shoots a lot of it on the CHP range
as well as any other ammo that they have on hand.

I stay away from all steel cases or other off the wall stuff. Just
brass or nickel for all of my shooting.