PDW ammo in 45acp

[zgunbear]

I built an AR pistol in 45 acp with an 8.5 inch barrel. I am trying to decide between carrying fmj in it or jhp. My reasoning is that when we close the gunstore and leave late at night if spmeone tries to rob the store I may have to shoot through a windshield or car door.  For that fmj would be preferable. However if the shot requires expansion not penetration jhp are better. What say you?

[TomInMN]

It might just be internet fodder, but why not stick to factory rounds for personal defense? It's one less thing for opposing counsel to try to pin you down with. Hornady Critical Duty loads are intended to be barrier blind.

Also, if your gun will run both reliably, you could load the top 3 or 5 or whatever you decide as hollow points, and everything else as penetrating rounds. If things devolve to the point of people behind car doors, you'll be better able to address that.

[zgunbear]

I only carry factory ammo for defensive use. I will look into Hornady critical duty.

[TomInMN]

3 minutes ago, zgunbear said:

I only carry factory ammo for defensive use. I will look into Hornady critical duty.

Sorry about that. My mind was stuck in the "reloading" part of this forum...

[DaveTN]

I’d go with JHP. A robbery situation where you would be justified in shooting someone in a car that wasn’t fleeing would be less likely than needing to make a gunman standing within feet of you unwilling or unable to fire his weapon at you.