I ended up with these 6 rounds of Peters .38ACP ammunition.
The bullets look like they are steel-jacketed, but they do not attract a magnet. They appear to be copper-jacketed bullets with either zinc or tin plating over the copper jacket.
The headstamp is PETERS .38 A.C.P.
I would be interested to know when these were made although that might be a tall order. Peters was bought out by Remington in the mid 1930s, but they continued to use the name for some time. However, the .38ACP wasn't a common round--maybe that combined with the headstamp might provide some clues.
