Description
The .36 caliber percussion revolvers and small-bore squirrel rifles are some of the most fun black powder guns out there, and they run best on a consistent ball. Speer's .375 diameter round balls are cold swaged from pure lead, which keeps every ball uniform with no voids or air pockets hiding inside. That matters more than folks realize, since an off-balance ball wobbles in flight and opens up your groups.
What Sets the Speer .375 Lead Round Balls Apart
Swaging under pressure gives these a smoother, rounder surface than most cast balls, and that helps the ball grip the patch and rifling evenly for cleaner rotation downrange. At 79 grains and .375 across, they're sized for .36 caliber cap-and-ball revolvers like the Colt Navy pattern and for smaller squirrel rifles. Load them over a lubed patch in a rifle or seat them straight into the chambers on a revolver and you'll get the tight, consistent seating that round ball shooters chase.
Loading and Shooting Your Speer .375 Round Balls
Round balls like these do their best work in slower twist barrels, roughly 1:66 or slower, and in smoothbores. If you're running a revolver, you want a ball just a hair larger than the chamber so it shaves a thin lead ring when you seat it, which tells you the seal is good. For patched rifle loads, pair them with a snug patch and your preferred lube and you're set for a day of plinking or small game.
Each box holds 100 balls packed in a sturdy plastic case that keeps them from knocking around and getting dinged in your range bag or on the shelf. Pure lead, uniform shape, and a trusted name that's been supplying traditional shooters for decades. Simple, dependable components that let the fun part take over.
Key Specifications
- Manufacturer: Speer
- Manufacturer Part Number: 5113
- UPC: 076683051134
- Caliber: 36 Cal
- Projectile Diameter: .375 in
- Bullet Weight: 79 gr
- Bullet Style: Lead Round Ball
- Material: Swaged Pure Lead
- Units Per Box: 100
- Usage: Hunting / Target Shooting
- Packaging: Protective Plastic Box
What’s Included
- 100 Speer .375 (36 Cal) 79 gr lead round balls
- Protective plastic storage box
Frequently Asked Questions
What guns do these Speer .375 round balls work in?
They're sized for .36 caliber muzzleloading firearms, including cap-and-ball revolvers like the Colt Navy pattern and smaller squirrel-style rifles. Round balls perform best in slower twist barrels around 1:66 or in smoothbores. In a rifle you'll load them over a lubed patch, while in a revolver they seat directly into the chambers.
Why choose swaged lead balls over cast ones?
Speer swages these from pure lead under pressure, which produces a more uniform ball with no internal voids or air pockets. That consistency keeps the ball balanced in flight so your groups stay tighter. The smoother surface also helps the ball grip the patch and rifling for cleaner rotation.
How many round balls come in a box?
Each box holds 100 of the .375 diameter, 79 grain round balls. They come packed in a protective plastic case that keeps them from getting dinged or deformed in storage or in your range bag.
Should the ball be bigger than my revolver chamber?
For cap-and-ball revolvers you generally want a ball slightly larger than the chamber mouth. When you seat it, a thin ring of lead should shave off, which confirms you have a good gas seal. That snug fit is a big part of getting consistent accuracy from these round balls.





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