Put one bullet in saltwater for a week, if the jacket rusts it is iron, if not it is likely a cupro-nickel alloy. Nickel content over 50% is enough to attract a magnet.
I wouldn't worry too much about a thousand rounds through a 45. A lot of those GI 1911's had barrels last a very long time.
Jimro
__________________
Machine guns are awesome until you have to carry one.
|