Dunno, Richard... Doug (flamatrix99) was told today by a gunshow vendor that the 7.5mm Swiss he had on his table was "mildly corrosive".
Guess that's sorta like being mildly pregnant, eh?
.
I was told if you run an oversize drill bit through both ends of the barrel after shooting FMJ it will last forever.
and just which table was yours at Lamar-Dixon today?