Off topic, sorry.

I am a newbie here and don't know where to or how to ask a question. I can find no specific place to do so. Maybe you can help me out there?

So here is my first question:
Can it be determined what size pistol primer is needed for 45acp by looking at the hole size at the interior base of the case? I have seen three different size holes at the bottom. One is tiny, the next is a little bigger and the third is the largest. Can I assume that the largest takes the "large pistol primers" and the tiny takes the "small pistol primers"? The middle guy baffles me all to hell.
See attached pics: