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Barnes Expander Mz Bullets - 54 Caliber (0.500'''') 325gr Expander Mz Flat Base 24/Box
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
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SKU: 749065021
Overview
Built for muzzleloader hunters who want a dependable expanding bullet, this Barnes option uses a 100% copper design with a large hollow cavity to promote quick, sure expansion. It is intended for use where consistent shot-to-shot velocities and accuracy matter, especially in hunting situations that call for confidence on the first shot. The bullet is described as expanding to twice its original diameter and forming six copper petals, while avoiding fragmentation and retaining its weight. For hunters looking for a tough, deep-driving muzzleloader projectile, it offers a focused design with a clear emphasis on terminal performance.
Why Hunters Choose the Barnes Bullets
100% Copper
Muzzleloader bullet construction
Large Hollow
Cavity supports quick, sure expansion
Consistent Shot-to-shot
Velocities
Available 325-grain,
.54 caliber configuration
Flat Base
Design in a 24-bullet box
Key Features
- 54 caliber, 325-grain Expander MZ muzzleloader bullets
- 100 percent copper construction
- Large hollow cavity designed for quick, sure expansion
- Built for consistent shot-to-shot velocities
- Expands to twice original diameter with six copper petals
- Typically retains 100 percent of original weight
Best Used For
- Muzzleloader hunters wanting a Barnes Expander MZ bullet for consistent shot-to-shot velocities.
- Hunters seeking a 54 caliber, 325-grain projectile for muzzleloader loading applications.
- Shooters prioritizing quick expansion from a large hollow cavity in a copper bullet.
- Hunters who want a deep-driving bullet designed for both high and low velocities.
Specifications
| Bullet Style | Expander Mz Flat Base |
|---|---|
| Bullet Weight | 325gr |
| Caliber | 54 Caliber (0.500'''') |
| Cavity | Large, hollow cavity |
| Material | 100% Copper |
| Quantity | 24/Box |
| Type | Muzzleloader bullets |
Pros
- 100% copper muzzleloader bullet construction
- Large hollow cavity supports quick, sure expansion
- Designed for consistent shot-to-shot velocities
- Available in a 325-grain, .54 caliber configuration
- Flat base design in a 24-bullet box
Considerations & Trade-offs
- Designed specifically for muzzleloader use, so it is not a general-purpose bullet for other firearm platforms.
- The large hollow cavity and expansion-focused design are intended for quick expansion, which may be less suitable where minimal expansion is preferred.
- At 325 grains, this is a relatively heavy projectile, so load development and compatibility should be checked against the shooter’s muzzleloader setup.
- Packaged 24 per box, which may require more frequent restocking for high-volume practice or load testing.
Suggested Comparisons
- Muzzleloader bullets
- Copper bullets
- Expanding hunting projectiles
- Black powder hunting ammunition
Suggested Accessories
- Muzzleloader powder
- Primers
- Bullet starter
- Loading accessories
Frequently Asked Questions
What type of bullet is the Barnes Expander MZ 54 Caliber 325gr Flat Base?
It is a muzzleloader bullet from Barnes, described as the muzzleloader version of the X-Bullet. The product title identifies it as a 54 caliber (0.500") 325gr Expander MZ Flat Base bullet, sold 24 per box.
What material is the Expander MZ bullet made from?
The source data says it is 100 percent copper.
What kind of expansion does Barnes describe for this bullet?
Barnes says the bullet has a large hollow cavity for quick, sure expansion and can expand to twice its original diameter, forming six copper petals.
Does the product description mention fragmentation or weight retention?
The description says there is no fragmentation and that these bullets typically retain 100 percent of their original weight.
What performance claims are provided in the source data?
The source data says the bullets are designed to produce more consistent shot-to-shot velocities and better accuracy than competing bullets, with deadly performance at both high and low velocities. Those are the claims provided; no additional performance details are given.