The box on the left is Canadian .45ACP, headstamp: DI 42 45 AC. Why 42 rounds in a box, I dunno. The box is the same height as the 9mm box but a slight bit wider, so maybe they wanted packaging the same size and therefore 42 rds was the magic number?
The box on the right is Canadian 9mm headstamp: DI 43 9mm
42rds is 6 1911 magazines. Makes sense to ship the ammo to best suit the size of magazine its filling.
42rds is 6 1911 magazines. Makes sense to ship the ammo to best suit the size of magazine its filling.