RCBS Universal hand primer, I have two, one set for large, one set for small. No more swapping parts.
Hand operated, no shell holders needed, no fuss swapping calibers as long as they are the same size primers.
They are not cheap, spent over 60$ for my first, a bit less for the second one well used.
A smear of Imp sizing wax on the main push rod keeps them working smooth and easy.
I had an older friend, long time reloader look at a 100 round box of my ammo and he was seriously puzzled.
"I've never seen that many rounds primed so consistently perfect. No high ones, no low ones. They are all exactly the same and all perfect"
So my next trip I took it along to show him, let him prime up some 9mm brass.
He was impressed. And he's a hard guy to impress.
Love mine, would never change to anything else.