[Southron]

Cats climb trees all the time and then get stuck in them....but you never see any cat skeletons in trees.

The barrels of belt fed machine guns can get white hot when fired in a long burst....but you never see pictures of a machine gun with the white hot barrel drooping or bent down.

Regardless, firing a burst so long (with either live or blank ammo) to the point to where the barrel becomes white hot screws up the "temper" of the barrel and ruins it.

So, unless your squad is being overrun by a "Human Wave" Assault of the 666th Bad Guys Division, there isn't much of a reason to fire your belt-fed MG until the barrel turns white hot.