Did not know that you could get a bullet that big fired out of a hand gun by gas?
And thats the same .50cal
LOL
Thats the difference between gas operated and gas powered.
Im no gun nut, I shall confirm this with a friend who is. But im pretty certain they mean the hot gasses from the bullet are used to re **** the loading mechanism.
The energy is still stored in the gunpowder.
Of course you may be joking in which case egg and my face are in alignment.