Speer 5133 .451 Caliber 138 GR Black Powder Lead Balls - 100 Count for Muzzleloaders

Speer .451 caliber 138 grain black powder lead balls are purpose-built projectiles for traditional muzzleloaders. This 100-count pack gives you a full supply of swaged pure lead balls sized for .451 bore muzzleloaders, whether you're hunting with a flintlock, caplock, or inline. These round balls deliver the consistency that matters when precision and reliability are part of your shot—no voids, no surprises.

Speer's manufacturing process prioritizes uniformity across every ball in the box. That consistency translates to predictable flight and tighter grouping downrange. A truly round ball matters for black powder shooting: it seats properly in the bore, engages the rifling evenly, and performs the same shot after shot. Whether you're working up loads at the range or preparing for a season in the field, these balls give you a foundation you can trust.

For shooters who handload their own black powder cartridges or cast their own projectiles, Speer round balls remove one variable from the equation. At 138 grains, these balls pair well with standard black powder charges in traditional rifle and pistol calibers. The 100-count box keeps your supply manageable without forcing bulk purchases, making it easy to stock up for the season or test a load before committing to a larger order.

Key Features

• .451 caliber sizing for traditional muzzleloaders
• 138 grain weight per ball
• Swaged from pure lead for consistency
• 100 balls per box
• No voids or air pockets
• Smooth, uniform surface for reliable performance

Specifications

Frequently Asked Questions

What muzzleloaders do these .451 lead balls work with?

These balls are sized for .451 caliber muzzleloaders. Check your rifle or pistol's bore size to confirm compatibility before purchasing.

Can I use these with black powder substitutes?

Yes, Speer round balls work with black powder and black powder substitutes. Follow your rifle manufacturer's guidelines for safe load development regardless of the propellant you choose.

How many balls come in a box?

Each box contains 100 lead balls, giving you a practical supply for range sessions or hunting season.

Are these lead balls suitable for casting or handloading?

These are finished, swaged round balls ready to load—not bulk lead for casting. If you need casting material, you'll want to look at lead ingots or bulk pure lead instead.