I had to look up what a Remington 7 1/2 primer was, and I got carried away...and a chart was born.
It's helpful to me, maybe to you too.
UPDATE:
Thanks for the sharp eyes and the correction ! I added the Federal match primers, I just missed 'em the first time.
I did not include the military spec primers or the imported (Wolf, Mag-tech, Fiocchi) primers on purpose; I have never used any of them, and probably won't.
Thanks for the many replies. I don't know how to sticky it; if someone knows how and wants to, go for it !