Could a wet, leather Zulu shield really stop a musket ball?

First off, Shaka Zulu had dead for several decades at the time of the 1879 Anglo-Zulu War (he died in 1828) and Cetshwayo had become king in 1872. Furthermore, British troops in that war used the modern Martini-Henry rifle, not smoothbore muskets.

I think this is one of those cases where a claim about one thing has been mistaken for another, creating a myth that has grabbed popular imagination.

We have to understand a little bit about guns and the arms trade in Zululand prior to the 1879 Anglo-Zulu War. In the mid-1800s, the European arms market was flooded with old muskets that were by now badly-obsolete. As a result, Western arms traders in Mozambique and the southern African colonies did a brisk trade running guns to the Zulus at cut-rate prices. By 1870, a Zulu warrior could buy a flintlock Brown Bess musket for the price of a sheep!

As a result, guns, albeit obsolete ones, were pretty common in Zulu hands by 1879. However, getting guns was one thing. Gettig ammuniton was another. Without arsenals of their own, Zulu warriors often loaded their muzzle-loading muskets with scrap metal or stones. Instead of using Western-style paper catridges with a set amount of powder, they used powder horns and had to guesstimate how much powder to pour down the barrel. Plus, much of this gunpowder was old, low-quality stuff. As a result, a great many Zulu warriors were firing under-charged muskets that scattered their unaerodynamic ersatz bullets at low velocities.

I think this is where the "Zulu shields could stop a musket ball" story comes from. It's very possible some Zulu shields did stop musket balls and bits of scrap iron fired from under-charged muskets wielded by other African warriors (like the rival Xhosa).A leather shield might very well have been able to stop these projectiles.

However, I doubt such a shield could stop a properly-loaded .75 lead ball from a Brown Bess. The muzzle velocity of a ball from a Brown Bess is 800-1,200 feet per second, depending on the quality of the powder, the size of the charge and if the ball is wadded to get a tight fit in the barrel. That'd be a tall order for a leather shield 50 yards away to stop.

Now, the velocity of a musket ball drops off pretty quickly. The effective range of a smoothbore musket is only around 100 yards. By about 200 yards, the ball is spent and has very little penetrating power. Perhaps part of the legend comes from Zulu shields stopping spent musket balls?

There's no way in hell a Zulu shield would stop a .450 bullet from the Martini-Henry rifles used in the 1879 War. This rifle fires a heavy .450 bullet at a muzzle velocity of 1,300 feet per second. It's accurate out to 400 yards, but can still kill at up to 1,000 yards in skilled hands. Although the bullet does "rainbow," it stays moving at potentially lethal velocities far longer than a .75 ball from a Brown Bess. I haven't found a single reference in any accounts of the Anglo-Zulu War of British bullets bouncing off Zulu shields and I strongly doubt any such accounts exist in the first place

Bottom line, I think people have taken a handful of cases where smoothbore musket balls fired by African warriors in less-than-ideal conditions glanced off a leather shield. This has then been re-imagined into the fanciful scene of British Martini-Henry rifle bullets pinging cartoonishly off leather shields.

One of my earlier posts has more on the role of firearms in Zulu warfare: https://www.reddit.com/r/AskHistorians/comments/a9pa3j/comment/ecmdphe