Contemporary English Version
In this army there were 700 left-handed experts who could sling a rock at a target the size of a hair and hit it every time.

New American Bible
who were left-handed, every one of them able to sling a stone at a hair without missing.

Douay-Rheims Bible
Who were seven hundred most valiant men, fighting with the left hand as well as with the right: and slinging stones so sure that they could hit even a hair, and not miss by the stone's going on either side.

Who were seven hundred most valiant men, fighting with the left hand as well as with the right: and slinging stones so sure that they could hit even a hair, and not miss by the stone's going on either side.

700 men left-handed seem therefore to have been made slingers, because they could not use the right hand, which is employed in managing heavier arms; and they could discharge the stones from the sling in a direction against which their opponents were not upon their guard, and thus do the greater execution.

Judges 3:15 And afterwards they cried to the Lord, who raised them up a saviour, called Aod, the son of Cera, the son of Jemini, who used the left hand as well as the right. And the children of Israel sent presents to Eglon, king of Moab, by him.

1 Chronicles 12:2 Bending the bow, and using either hand in hurling stones with slings, and shooting arrows: of the brethren of Saul of Benjamin.

sling stones

600 feet distances.

1 Samuel 17:40,49,50 And he took his staff, which he had always in his hands: and chose him five smooth stones out of the brook, and put them into the shepherd's scrip, which he had with him, and he took a sling in his hand, and went forth against the Philistine. . . .

1 Samuel 25:29 For if a man at any time shall rise, and persecute thee, and seek thy life, the soul of my lord shall be kept, as in the bundle of the living, with the Lord thy God: but the souls of thy enemies shall be whirled, as with the violence and whirling of a sling.

2 Chronicles 26:14 And Ozias prepared for them, that is, for the whole army, shields, and spears, and helmets, and coats of mail, and bows, and slings to cast stones.