TG>  DS> Actualy, the 20mm DU round has a thick jacket to protect the 
TG> barrel. 
TG>  DS> I beleive the jacket is aluminum.  Their made using *spent 
TG> uranium 
TG> fuel
TG> 
TG> Hmm, Aluminum flashes at high velocity, IE: friction (Thermite).
    Only if the aluminum is in a powdered (or other finely-divided) form. 
    Thermite is a mixture of powdered aluminum and iron oxide, which is why 
the aluminum will ignite...and reliably only if a primer mix is used to 
generate very high temperature.  Some flashbulbs use fine aluminum wire.  
    But the aluminum skillet of yours won't ignite on a red-hot stove burner, 
because the aluminum is not finely-divided.  Even if you let the skillet boil 
dry with the burner on high, the aluminum melts and doesn't burn.
--- Simplex BBS (v1.07.00Beta [DOS])
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