I can not ID this round. I have 20 or so and they were mixed in an auction lot. Someone went to a lot of trouble cutting down, annealing, and reforming the brass. The headstamp ( original starting point) is 30-30 Winchester. The round is rimmed. The bullet is a hollow point .308. Sharp shoulder, probably not yet fire formed? Good looking cartridge, I thought it was the new 300 Blackout round , but the dimensions do not match, and it is rimmed.See pic.
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