quote:

Is firing a 5.56 NATO cartridge in your .223 Remington chambered AR15 dangerous? Or do Internet forum-ninjas and ammunition companies selling you commercial ammo instead of surplus overstate the dangers?

Believe it or not, a real danger exists, and some gun owners who think they are doing the right thing may not be safe..............


http://www.humanevents.com/article.php?id=41770