[xone]

'12.7x99 BMG (.50 BMG) is a deadly round that was designed to penetrate tank armor.' Must have been thin tanks.

[TexasCowboy]

"Must have been thin tanks."

Yeah, they were.

The Germans built the first ones during WWI to penetrate British armor.
The British simply added more armor.

The British began using them in WWII to penetrate German armor.
Learning from the British, the Germans simply added more armor.

[Chinese_American_Patriot]

I read that the .50 BMG was created by Germans near the end of WW1 to penetrate the new war vehicle known as a tank.

[Army Air Corps]

Also, the author doesn't know much about ballisitics. Calibre alone is not a determiner. Other factors are: grains of powder, shape of projectile, mass of projectile, etc. Some .50cal musket balls would do little more than dent the fender of a truck. I really hate articles about firearms written by dolts who known damn little about them - arrgghh!