corrosive?

[Pattern14]

EPR16
Don't clean it after shooting, wait a couple of weeks, and look down the barrel. If it looks like the Amazon rain forest inside- it's corrosive.

A lot of corrosive ammunition today is military surplus or stuff from countries I have trouble spelling.

Actually, don't worry if it's corrosive, just make sure you flush the barrel with hot water after shooting, let it dry and oil it. You'll be fine and the barrel will appreciate and love you for it.