.300 Blackout upper or just get high-end 5.56 hunting ammo?

[MDWS]

Legalities aside, you should always choose an appropriate hunting bullet for hunting, regardless of caliber.

It's the ethical thing to do and will result in less lost game.

Agree 100%.

[Turnkey11]

I've shot dozens of deer, most with a carbine length AR. People that lose deer suck at shot placement, plain and simple. I hunt from the ground only and never had an issue with making a good heart and lungs shot, haven't found a round yet that doesn't leave a golf ball sized hole on the opposite side of the rib cage to include the 60 gr Nosler Ballistic Tip that I use for prairie dogs. Hunt with your AR with confidence.

[Dirty_H]

Not to hijack, but I have some Black Hill's 55GR softpoints, would those do ok on deer? I would use my 20" rifle.

[ccoker]

I have killed a lot of deer with a 223 and it is used a lot by older guys who know how to shoot and don't rush or take bad shots.

55g SP, 64g or Barnes TSX will cleanly kill whitetails within a resonable distance..

I have two 556 ARs but hunt with a 6.8 AR and have owned a 300 as well.
My favorite of all 3 is the 68 but all 3 work.

[TexasGunNut]

I've knocked down a lot of deer with a .223 as well. Use a good quality hunting bullet and place it right.