Description
You’re in the woods, the season is on, and your muzzleloader is your primary tool. When it comes to putting meat in the freezer or punching a clean hole through paper, consistency is everything. You need a projectile you can trust to fly true and hit hard, shot after shot. That’s where proven designs and quality manufacturing come in.
The Thompson Center Maxi Ball 50 Black Powder Maxi-Ball 320gr, 20 PK is a premium, pre-lubricated conical bullet designed for .50 caliber muzzleloading rifles. It delivers deep penetration and massive energy transfer for hunting medium to large game, offering superior ballistic performance over traditional round balls in a convenient, ready-to-load package of 20 projectiles.
This isn’t a plinking round. The 320-grain Maxi-Ball is built for terminal performance. Its heavy, solid lead construction and unique conical design with deep grease grooves are engineered for stability in flight and controlled expansion on impact. The pre-applied lubricant serves a dual purpose: it reduces fouling for easier loading and consistent shots downrange, and it ensures reliable ignition. Here’s the thing—consistent accuracy starts with a consistent projectile, and these are machined to exacting standards.
Loading is straightforward. The design is drop-in ready for rifles with a fast-twist barrel that favors conical bullets, like many modern in-line muzzleloaders. It’s specifically engineered for compatibility with Thompson Center’s own line of .50 caliber black powder rifles, such as the Triumph and Impact series, but will perform excellently in other quality brands with similar 1:28″ or faster twist rates. You get a full box of 20 projectiles, priced at $19.35, making each shot a calculated investment in your hunt’s success.
| Caliber | .50 |
| Projectile Type | Conical Maxi-Ball |
| Weight | 320 Grains |
| Quantity | 20 per pack |
| Lubrication | Pre-Lubricated |
| Material | Solid Lead |
Pros: Delivers exceptional knockdown power and deep penetration for ethical takedowns of deer, elk, and bear. The pre-lubricated design simplifies loading and promotes shot-to-shot consistency. The heavy 320-grain weight bucks wind better than lighter options, aiding in long-range accuracy for a muzzleloader.
Cons: Requires a muzzleloader with an appropriate fast-twist barrel (typically 1:28″ or faster) for optimal stabilization. May load with more resistance than saboted or patched round ball alternatives, which is normal for a full-bore conical.
This pack is for the serious muzzleloader hunter who demands maximum terminal performance. It’s for the shooter who has a rifle capable of stabilizing heavy conicals and wants to leverage that advantage in the field. If your goal is clean, one-shot harvests with a traditional firearm, this is your projectile.
Frequently Asked Questions
Q: What powder charge should I use with these 320-grain Maxi-Balls?
A: Always consult your rifle’s manual first. A common and effective starting point for many modern .50 caliber in-lines is 100 grains of black powder or equivalent substitute by volume. Work up your load from there, checking for accuracy and consistent point of impact.
Q: Can I use these in a slow-twist, traditional side-lock rifle meant for round balls?
A: It is not recommended. Traditional rifles with twist rates like 1:66″ are designed to stabilize round balls. A heavy conical like this will likely not stabilize, resulting in poor accuracy and keyholing. Use in fast-twist barrels (e.g., 1:28″, 1:24″) only.
Q: Do I need to add any additional patch or lubricant?
A: No. The Thompson Center Maxi Ball is pre-lubricated and designed to be loaded directly onto the powder charge. The grease grooves are filled at the factory—just load and shoot.
Ready to stock up for your next black powder season? This Thompson Center Maxi Ball 50 Black Powder Maxi-Ball 320gr, 20 PK is available at firearms-missouri.com for Missouri residents and nationwide to compliant states. Add it to your cart to ensure you’re prepared when the moment of truth arrives.
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