Never looked at a fired case, most likely berdan dual flash holes.
From their site:
NON-CORROSIVE
123gr FMJ (Steel Core)
Bimetal Steel Case
Loaded in Canada with surplus pulldown components and new non-corrosive primers.
Bulk case of 500 Rounds
From their site:
NON-CORROSIVE
123gr FMJ (Steel Core)
Bimetal Steel Case
Loaded in Canada with surplus pulldown components and new non-corrosive primers.
Bulk case of 500 Rounds