.45acp loads

[Gord0]

I run 200gr extreme round nose over AA#2 or W231 for plinking. Higher end load so it's clean and functions well.
Defense load. 200gr gold dot over 12gr VV N105 in nickel starline brass. That load isn't for the faint of heart in an M&P shield 45.

[gunner999]

I run 200gr extreme round nose over AA#2 or W231 for plinking. Higher end load so it's clean and functions well.
Defense load. 200gr gold dot over 12gr VV N105 in nickel starline brass. That load isn't for the faint of heart in an M&P shield 45.

I am a newbie here and I don't know if I am at the right place to ask questions, BUT>

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: ----------but I don't see anywhere that I can attach them.