What does the BMG in 50 BMG stand for?

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Tags

1. #browning
2. #intended
3. #metallic
4. #links
5. #caliber
6. #designated
7. #cartridge
8. #continuous
9. #service
10. #developed
11. #using
12. #official
13. #1910s
14. #machine
15. #entering
16. #rounds