Over penetrate what? It all depends on what you are shooting at. A 223 FMJ round will go through a person, drywall, car doors, even solid wood doors. If you can be more specific, I can help you out.
full metal jacket (copper)
Full Metal Jacket. The lead core is covered by a thin jacket of metal.
Expanding Full Metal Jacket
Full Metal jacket.
No, it is not legal to use full metal jacket ammunition for hunting in Texas. State regulations require the use of expanding bullets or ammunition designed to expand on impact for hunting purposes to ensure a more humane and effective kill. Using full metal jacket ammunition can lead to wounded animals and unethical hunting practices.
9mm Luger full metal Jacket.
7.62 is the ammunition's diameter, expressed in millimeters. Full metal jacket (FMJ) means that the bullet is made of lead, and fully jacketed with a (usually brass) covering.
Ball ammunition has a soft lead core and a full or sometimes total metal jacket made of gilding metal, cupronickle, or steel alloy.
Full Metal Jacket.
a magazine full of live rounds//Full Metal Jacket means: A full metal covering of the led bullet which is usually copper. A magazine full of live rounds would have rounds (bullets) with a Full Metal Jacket. :D
Ball ammunition has a solid copper or steel jacket (full metal jacket), completely covering the bullets core, usually made of lead. The base, or back of the bullet can be exposed lead. If the base is jacketed in metal as well, it's known as a total metal jacket. The Geneva convention dictates that all small arms ammunition used in armed conflict be ball ammo, in order to avoid the truly catastrophic injuries that result from hollow point, poisoned, cross tipped, soft point,etc...
"Full Metal Jacket" was filmed in England ~ see related link below for additional information .