I once bought a Winchester M43 from an old backwoodsman in Ga, It came with the 20 year old sales receipt from when he'd bought it, and the remainder of the original box of shells. He'd shot a deer with it every year for 20 years, and only had to shoot one of them twice. There were 29 rounds left in the box.
Granted, he'd shot them at rock-throwing distances as they came in to a salt block on the edge of his property, but the .22 Hornet did a fine job nonetheless.