Basically it says that Hornady 55gr and 72gr .223 did not meet FBI requirements for terminal performance.
Pardon my ignorance: where does the FBI list its performance requirements of .223 ammo?
I know that, for
handgun ammo, the FBI requires penetration between 12 and 18 inches; in bare gelatin and in gelatin with 7 different barrier conditions.
For .223, I find nothing about FBI requirements. BTW, the lower penetration of .223 rounds (compared to "duty" handgun rounds), rather than being considered a "deficiency," is usually claimed that is a tactical advantage over handgun rounds.
I did find
this from a non-FBI source:
The critical minimum velocity for obtaining maximum terminal performance from .223 Remington/5.56mm ammunition is approximately 2700 fps.
The quote addresses "optimal performance", not minimal and maximal values (as for handgun bulet penetration); and does not seem to be the "official" position of the FBI.
Hornady-LE lists 8 loads in .223 and 5.56. Only the 75 grain loads do not reach 2700 out of a 16-in barrel. I usually think of 75 gr loads as long-distance accuracy rounds; I'm not sure how often they would be selected for rifles with 16-in barrels.
I note that Winchester-LE does not offer a .223 or 5.56 75 gr. They list 3060fps for a 69 gr bullet, without specifying the barrel length.
A few of their rounds do meet the minimum. However, that is out of 4.5" or longer barells.
I should be surprised that standards designed for duty guns were tested using duty guns?
If a bullet barely meets the standard in a 4.5" gun what will it do in a 3.5" CCH?
Very likely: it will penetrate
more.
Winchester sells their PDX-1 to the public
Ah: the very same company that started this "LE-only" ammo business with Black Talon, and continued it with the Ranger-LE line.
I've had Critical Defense with dud primers.
Important problem. But it might not be just the ammo.
Hornady lists its primer "all fire" strike depth as 0.017 inches. To the extent gun produces a strike depth more shallow than that, you may/will get misfires. It absolutely may mean that Hornady is NOT the ammo for your gun; it may not however mean that the ammo would misfire in a different gun.
I think we're all used to the idea that some ammo has "hard" primers, some "soft." Perhaps Hornady falls into the hard primer category.