>>1127000Marbles are terrible due to manufacturing flaws. They are more apt to go off course than steel balls of the same diameter.
>$19.99>10lbs>about 500pcs (nearly $0.04 each)https://www.ebay.com/itm/1-2-Inch-Sling-Shot-Ammo-Steel-Balls-10-LBS/302199972997You can plink with the cheaper stuff, just to train yourself, but for hunting use the good stuff.