Wiktionary
vb. (en-third-person singularround out)
Usage examples of "rounds out".
The fact that the prince would be unable to fire military bead rounds out of it when he ran out of chemical-powered ammo had been a big part of it, but so had the sheer grunt work involved in lugging along the cases of ammunition the prince (still in original, patented, pain-in-the-ass mode) had insisted on bringing down to the planet.
Sergeant Wilson lifted up and fired a burst of five rounds out the window at the wall.
He took four hundred rounds out and stuffed them in his bag then kept hunting.
It was still fairly heavy: I might have only fired two or three rounds out of it.
Slipping sabot rounds out the trapdoor, he drops them into a pocket.
He was almost sure to get lucky with one or two rounds out of nine, for God’.