9mm brass primer pockets

I got a bunch of 9mm brass to cut down to 9x18Mak. This is the first time I've fooled with the 9mm brass. I have a couple of S&B cases with very tight primer pockets. So tight that I can't revolve my RCBS primer pocket cleaner. This is not crimped brass, the size is the entire depth of the hole.

My question is - is this brass worth trying to prime or should I just toss it?

Wayne I have never done what you are going to try.
I would try a few and then make up my mind after seeing how hard or easy it was.

Good Luck Ken.