linkzeldi said:
Okay here's the thing, what material other than metal would function as a bullet?
Unless you can answer that, I doubt a sniper could kill Magneto.
any high density ceramic, bone bullets, quartz bullets, pretty-much any crystal ( presuming it's tough enough to be fired in the first place )
most types of rock,
or any non magnetic metal ( of which there are quite a few )
Tin
Lead-*
Chrome
Zinc
Copper
Calcium
*
( this is what bullets are actually made from, mostly... but i will grant they can contain some traces of magnetic materials, so whatever )
again, this really asks the question is magneto's magnetic ability actually magnetic, or just magic
there are certainly things you could fire at him that are not magnetic, of this there is no doubt
but since he can control lead and metals that do not seem to contain high quantity's of iron, Cobalt or nickel - yes i mean alloys too.
including wolverine's Unobtainium skeleton**
( the metals considered magnetic for the purpose of moving them with magnetic fields )
it really calls into question exactly what his super-mutation is
i would say, yes you could kill magneto with a bullet of x-substance that contains 0 metal if you had to
but then again, if he had those powers he could make himself a metal nano-shell and deflect bullets of all kinds
but the op stipulates 'when his defences are down' so the answer is yes, really.
with a magnetic bullet? depends if his ability to sense magnetic objects is passive or active, and we don't know that ( or i don't anyway )
**
http://en.wikipedia.org/wiki/Unobtainium
see science fiction
cause i know i just made a wolverine fan die of rabid foaming
for getting his sci-fi accurate