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The AR15.Com Ammo Oracle

History and Basic Design of .223 and 5.56 Ammunition.

Performance of .223 and 5.56 Ammunition.

Terminal Performance of .223 and 5.56 Ammunition.

.223 and 5.56 Ammunition Testing

Selection of .223 and 5.56 Ammunition.

Ammunition recommendations from the authors of the AR15.com Ammo-Oracle.

Purchase and Storage of .223 and 5.56 Ammunition.

Legal questions.

Miscellaneous .223, 5.56 and Other Ammunition Questions.

Ammo Oracle

Q. Holy earache Batman! This Q3131A/Lake City XM193 is really loud and it launches a FIREBALL from my muzzle! Everyone at the range is looking at me now. What gives?


Q3131A and XM193 are Mil-Spec M193. They mean business. They are loaded hotter than most commercial loads and you're likely to notice that as soon as you fire them--especially out of a 16" post-ban barrel without a flash hider, you are going to get quite a bit of blast and a fireball. Some M193 may have flash retardant, but it's just no match for a short barrel without a hider. Prepare yourself for surgery on your ears if you have one of those short barrels and a muzzle brake. Always wear eye and ear protection when shooting!

A wee bit of muzzle blast.

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