Thread: Does this powder have other names?

From the load weight, it's most likely to be ar2208 but thats an assumption not backed by any other evidence. The batch number may give some correlating info but still assumes the contents match.
If the guy didn't have any other powders or reload for anything else it's a reasonable bet it is OK to use as long as it smells ok and there are no brown fumes or acidic odour.
They still make 2208 so it's no great loss if you do choose not to use it.