Are primers interchangeable if so which ones are and which ones are not

[Deadlock213]

I was reloading 9mm and 40 Smith & Wesson and saw that the primers are roughly the same size if not the same size and I was wondering if you could interchange them

 

[nksmfamjp]

I was reloading 9mm and 40 Smith & Wesson and saw that the primers are roughly the same size if not the same size and I was wondering if you could interchange them

Yep

 

[Deadlock213]

Yep

Awsome thank you