Unless you were using it as a training aide to save a little on ammunition. But then again I'm not up on the coat of that ammunition. Besides .22 dedicated ARs are readily available and cheap as is the ammunition.
I would never consider corrosive ammo a problem. You just clean your weapon slightly differently.
"Take care of your weapon, and your weapon will take care of you."
What your D.I. said in boot camp is still true.
And depending on how future history unfolds, 5.45 just might be the second most readily available ammo on the battlefield.
__________________ I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."