This is also the way birdshot in a shotgun works.
A shotgun is a smooth-bore gun, with a cartridge packed with round lead shot. It may be only one shot, when the gun operates like a musket (lots of oomph, little range or accuracy). A dozen or so would be buckshot, suitable for deer (illegal in the UK -- you must use a rifle).
Bird-shot is dozens and dozens of tiny pellets, which spread out as they fly, giving a much better chance of hitting a moving target with one or two of them. A shotgun is therefore really also a "scatter-gun".
I think a scatter-charge in a cannon was also called grape-shot.