I believe the urban myth of the "tumbling bullet" that the zero bonger is referring to is the caliber he states(5.56) with the M-16 cartridge.
The myth was that the bullet would hit it's target, and because of it's high speed, tumble upon entry and cause that much more internal damage.
That myth has been thoroughly discredited, and is common knowledge.
I bought an old M1891 Argentine Engineer's carbine with a case of 1940's corrosive berdan primed ammo from a friend. He wasn't real good about cleaning it after he fired it, and consequently the bore was black and so rough that it shredded the first cleaning patch I ran through it. When I test fired it, it keyholed at 25 yards.
I didn't realize it at the time, but that must be the most deadly rifle ever made, because it tumbles the bullets so effectively. I think I'll have to check with DUmmie angka to see if somewhere in his vast trove of firearms knowledge he knows how I might isolate it and dispose of it without it causing an inadvertent massacre.
