What thick ness of metal will 223 round NOT go through?
Cane toad is right: Without more information12 feet is a safe betEnough rounds and a week enough metal and it is just a matter of time before something goes throughAs Ink said, the type of metal maks a huge differenceAs does the round, distance it was fired from and how many rounds are fired To give an example: If someone went to town on block of aluminum with an M249 and green tip, they could eventually penetrate a foot thicknessMaybe it would take 1000 rounds (I have not tried it and it depends on accuracy also) but every round would remove a litte more each time until it broke through On the other hand 3/8 of A500 steel can thousands of ball rounds from the same distance before it even starts to show signs of wearOther grades of hardened steel may take ball rounds from 25 yards all day, but get torn up by green tip immediately from that distance, though be able to take green tip from 200 yards no problem.
