Response to justanidea (Reply #58)
Wed Dec 12, 2012, 01:41 AM
nadinbrzezinski (112,889 posts)
61. Put enough lead through a barrel
Gunk builds up.
That's why. Also in aurora the magazine the shooter used is infamous for that, why DOD has not adopted it.
(And I wish I knew far less than I do)
To the (hopefully) lurking bald dwarf: You don't know shit.
The core of a rifle bullet is lead, but it is fully encapsulated with a copper jacket, hence the nomenclature of FMJ (Full metal jacket). Lead bullets can't exceed 1400 fps (feet per second). Above that velocity, the lead begins to melt. Lead bullet are limited to non magnum handgun load and low velocity rifle rounds. The rifle rounds must have a brinell (hardness) of at least 18. Ideally you would limit rifle rounds that aren't FMJ to a molly coated bullet.
The rifle in question was a AR-15. It is a 5.56mm round. The normal bullet weight is 55 grains traveling at a velocity of 2900 fps. As no one make s a lead bullet for a 5.56 round, and they can't be bought as a complete cartridge from a manufacturer, your explanation proves you are full of shit.
Stick to stuff you know about. But then, you would be a short, bald headed, dwarfed mute.
