cupro-nickel jacket bullet. .30-03 and early .30-06 bullets also used cupro-nickel jacket bullets. I'm not 100% sure, but I believe that the roundnose cupro-nickel jacket was replaced with a spitzer bullet jacketed with gilding ....
I think the US Army used 30-06 Cupro-nickel bullets all they way through WW I into the 20s.. And then they used up the older surplus rounds for training into the 1930s
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