Killed 1 8pt approx 125 pounds dressed, Bullet was a 55gr Remington Corelok factory load, the gun was a savage/stevens model 200 22" barrel, range was about 50yards, broadside shot, deer ran 60yards, no exturnal bleeding, was in a field so that was not a issue, deer died within site, inturnal damage was slite, bullet came unglued as soon as it entered the chest cavity. Moral to this story is : Yes the .223 will kill deer, would we do it again YES, but with this side note we'd be Using a Barnes Triple Shock or the Nosler Partition.