Barnes Bullets Expander MZ 50 Cal Muzzleloader Hollow Point 300gr - 15 Pack

The Barnes Bullets Expander MZ is a purpose-built 50-caliber muzzleloader bullet designed for hunters who demand consistent, reliable performance from their in-line rifles. This 300-grain hollow point is constructed from 100% copper, engineered to deliver the accuracy and terminal performance serious muzzleloading hunters expect. Whether you're hunting whitetail, elk, or other big game with black powder, the Expander MZ is built to perform across a wide range of velocities and hunting conditions.

What sets the Expander MZ apart is its dual-expansion design and full weight retention. The hollow point initiates controlled, double-diameter expansion on impact, creating razor-sharp cutting edges that maximize energy transfer and wound channel. Because it's copper through and through, you get 100% weight retention—no core-jacket separation, no fragmentation. That means deeper penetration, more predictable performance, and ethical kills downrange. The .451-inch diameter and 300-grain weight are optimized for 50-caliber muzzleloaders, giving you excellent ballistic stability with a sectional density of .211 and ballistic coefficient of .207.

This 15-pack gives you plenty of rounds for practice and hunting season. Barnes' reputation for accuracy extends to the Expander MZ line; these bullets shoot tight groups when seated properly, so you can focus on your shot placement rather than worrying about bullet performance. They're equally effective whether you're pushing them downrange at full velocity or hunting with moderate powder charges—a real advantage when hunting across different terrain and distances.

Key Features

• 100% copper construction for full weight retention and no fragmentation
• Double-diameter hollow point design for controlled expansion and deep penetration
• Razor-sharp cutting edges for maximum wound channel and energy transfer
• Optimized for 50-caliber in-line muzzleloaders
• Exceptional accuracy and consistent performance across velocity ranges
• Effective at both high and low muzzle velocities

Specifications

Frequently Asked Questions

Will Barnes Expander MZ bullets work in my 50-caliber in-line muzzleloader?

Yes. The Expander MZ is specifically designed and recommended for in-line rifles in .50 caliber. The .451-inch diameter and 300-grain weight are matched to modern in-line systems. Always verify compatibility with your specific rifle's recommendations.

What kind of expansion can I expect from the hollow point design?

The Expander MZ uses a double-diameter expansion design that creates controlled, mushroom-style opening on impact. Because it's 100% copper with no lead core to separate, it retains full weight while expanding, producing razor-sharp cutting edges and deep penetration.

Do these bullets perform well at lower powder charges?

Yes. Barnes specifically engineered the Expander MZ to be effective at both high and low velocities, so you have flexibility with powder charges without sacrificing terminal performance.

How many bullets are in this pack?

This is a 15-pack, giving you a full box for practice and hunting season use.