Two of the biggest machine gun rounds still in common use around the world today are the .50 caliber BMG and the 20mm round. These two rounds have been used for decades due to their immense power yet versatility and ease of use in the number of weapon systems they can be employed against. But how exactly do they compare? After all, they are both billed as long-range anti-personnel, armor, and anti-pretty much anything you can think of. In deciding which one causes the most damage, there are two