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Why America Made Bullets by Dropping Molten Lead 200 Feet Down a Tower — Shot Towers

Dustrialize

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A dream, a furnace, and a very tall tower.

This video dives into the bizarre history of shot towers: giant brick structures built for one purpose—dropping molten lead from incredible heights so gravity and surface tension could turn it into nearly perfect spheres. From William Watts’ 1782 breakthrough in Bristol to the massive towers of Philadelphia, Baltimore, Missouri, and even Australia, this is the story of how one elegantly simple idea transformed ammunition manufacturing for almost 200 years.

Inside: molten metal, old patents, Civil War production, industrial physics, and the forgotten engineering behind one of history’s strangest factories.

⚙️ Topics covered:
• Why early bullets and shot were so hard to make
• William Watts and the original Bristol shot tower
• How falling molten lead becomes spherical
• The science of surface tension and cooling
• American shot towers during the Embargo Act and War of 1812
• The Phoenix Shot Tower in Baltimore
• How shot was sorted, polished, and shipped
• Why the method survived for generations
• What finally replaced the tower system
• The environmental cost of lead production

If industrial history, lost manufacturing methods, and ingenious old-world problem solving are your thing, you’re in the right place.

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#ShotTower #IndustrialHistory #EngineeringHistory #Manufacturing #LeadShot #AmmunitionHistory #HistoryOfTechnology #ForgottenHistory #Dustrialize

shot tower, william watts, molten lead, lead shot, industrial revolution, ammunition manufacturing, engineering history, manufacturing history, phoenix shot tower, sparks shot tower, bristol shot tower, baltimore history, philadelphia history, civil war industry, war of 1812, surface tension, thermodynamics, historic factories, industrial archaeology, forgotten engineering

00:00 Intro
02:06 Failed Early Methods For Making Round Shot
03:48 William Watts And The Dream That Changed Ammunition
05:45 How Surface Tension Made Shot Towers Work
08:29 Building The First Shot Tower In Bristol
10:54 Shot Towers Spread To America
13:34 The Rise Of The Phoenix Shot Tower
15:54 Sorting, Polishing, And Mass Production
17:51 Decline Of The Towers And Newer Methods
19:44 Shot Towers As Landmarks And Their Toxic Legacy
22:11 Saving Historic Towers And Why The Idea Worked
24:32 Outro

20 Comments

@jackx4311 2 weeks ago

Why does your title read "AMERICA made bullets by dropping molten lead 200 feet down a tower" - when you make clear that the process was developed in ENGLAND, and USED in England?

@peterhearle874 2 weeks ago

There was a Shot tower still in Bristol. The company was called Sheldon Bush and I used to clean the bottom of the tower. They contain water contaminated with lead the name of my company was. Bristol Tank Company

@danyeager7561 2 weeks ago

Two guys in three-cornered hats (1700's era) playing with percussion rifles.

@jimamizzi1 2 weeks ago (edited)

My old man bless his sole made his own shot tower but off memory it was about 4’ high, perfect round shot, it take him a while to perfect it, dad sold them at his gun club as well as re loaded 12G shells. It paid for his hobby nicely. However I don’t think dad used water, I have a feeling he used oil because we all complained he stank out the back yard, so he made a shed at the far end of the yard, dads been gone for a long time this brings back fond memories, dad was well known his name was Joe and was a member of the metropolitan gun club in Epping Victoria. Thanks for the video 👍

@Scotian666 2 weeks ago

Loved the floating lead pellets!

@dmfraser1444 2 weeks ago (edited)

Did nobody making this not know that Lead the metal is pronounced "LED".

@pengoat9 3 weeks ago

I found a meteor in a sandstone cliff about 300 feet from the top .It was the size of a golf ball and almost perfectly round .It took about 2 years before i realized how it had been formed when i remembered having gone to a tower that Thomas Jefferson built to make round shot by pouring pre measured amounts of molten lead down a shaft 100 feet tall into cold water .

@scottbruner9266 2 weeks ago

4:00 Time warp. Plumber working with lead is using an ELECTRIC soldering iron

@dixierebel8422 2 weeks ago

Floating lead. Now there's a trick.

@fredwexler1362 2 weeks ago

In the 1970's I worked at Remington Arms Co in Bridgeport Conn. They used a shot tower every day. I spent some time in that tower. It was a long climb to the top. The molten lead fell from nozzles at the top and solidified into spheres on the way down and landed in cool water at the bottom. To check for roundness the shot rolled down a tilted flat metal sheet that had a gap half way down. Round shot rolled fast enough to jump this gap. Poorly shaped shot did not roll fast enough to jump the gap and were remelted to be dropped again.

@theshadow8694 2 weeks ago (edited)

The largest reliably size shot documented from shot towers was FF size, about 0.23 inches in diameter - roughly 5.8 millimeters. This video is misleading by mentioning lead balls/ammunition for the civil war. It was impossible for shot towers to produce larger round lead balls for pistols or rifles.

@JonathanWeir-g6q 2 weeks ago

When he figured this out I bet he was ecstatic. I wonder if he tried to keep it a secret or went to the pub and told everyone

@LAClarke58 11 days ago

Wisconsin also has a shot tower. Tower Hill state park in the western part of the state.The smelter house sits on top of a 90 ft. cliff. The molten lead is dropped down the side in a wooden shaft. It then enters a 90 ft.rock shaft that was dug by hand by only 2 miners. A horizontal shaft was dug to meet the vertical shaft. The shot was taken out of this tunnel,cleaned and sorted,put on wagons and taken to the nearby river. It was loaded onto barges and floated to various destinations.