Don’t try to stand in front of the pop gun 9mm, loaded with Hornady critical defense load, when it goes off.
I don’t think that the result will be much different from getting hit with a .45 ACP.
In both cases you will say “ouch”.
Be that as it may, and this is coming from a guy who does NOT normally carry a .45, my prison guard buddy tells me there are scads of cons in the joint walking around with 9mm holes in them. .4+, not so much....
I know the “sting” of the bullet friend. I know exactly what they feel like when they enter the body, and exit it. I don’t need you too suggest the ouch. I can tell you it is a heck of a lot more than that.