Wiktionary
n. (context nautical English) any mixture of stones and old iron, put into a wooden case and fired from a cannon as an anti-personnel weapon
Usage examples of "case-shot".
There were plenty of dogs here, caught by case-shot and shrapnel by the tattered look of them.
This was a small case-shot because the gun, a six pounder, was the biggest that could be worked up the steep hill-slope.
An artillery officer on the Lesser Arapile saw the case-shot leave the smoke, he saw it as the faintest trace of a grey pencil-like line in the air and then it exploded, just over the far edge of the Greater Arapile, and it was a black-grey air burst shot through with deep red and the ground beneath and ahead of the explosion was spattered by the lead balls and the shattered casing.
Many of the guns were of eight-inch bore, and they were firing case-shot, thin tin sheets full of lead musket balls.
The Fitra fugitives had never been exposed to case-shot before, and after about two hundred were casualties they began hoisting their helmets and invoking Galzar.