Lighter shot loses speed faster even with equivalent suggested charge of 1/3 weight.
Further.
Drop due do gravity is exponential. Batteries did sight "flat" at roughly 1ΒΊ40', not zero, to make up for the initial drop. Roughly 3-4 feet in the first 200m ( actually 195, 100 toises), rises to 20-23 by 400m (390m 200 toises). ( Boudriot )
Majority of gunnery tests conducted on land or stable ramps. Zero continuous roll.
Point blank for a 8 livres would be 500m.
This is just trajectory and reach, nothing to do speed/energy carried ( which ship composite construction does help to dissipate, is not a slab of steel ).