Zinc plated steel case

marsha2

Inactive
I have a PTR 91 and would like to know if MFS brand Zinc plated steel case
ammunition will hurt the barrel or chamber?
Thank you in advance to anyone who can point out either good or bad points on using this kind of ammunition.
So Far, I have used only Federal brand ammo.
 
I run silver bear which is zinc exclusively through my one AR for practice ammo. I have not had a hiccup so far with it and its relatively accurate. Chamber cleans up real nice easily.
 
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