The Barnes Expander MZ Muzzleloader Bullet is built for consistent expansion and weight retention across a wide velocity range. Designed for use with sabots in .50-caliber inline muzzleloaders, these projectiles feature a hollow cavity and Expander MZ profile intended to produce large-diameter expansion and deep, controlled penetration. Constructed of copper and sold in small-box quantities, they are aimed at shooters who prioritize repeatable performance and reliable terminal behavior at varied ranges.
Key Specifications
- The bullet weight is 300 grains.
- The bullet diameter is .451 inches.
- The listed caliber is .50 (50 caliber).
- The listed bullet type/series is Expander MZ Hollow Point.
- These bullets are supplied with a sabots: Yes configuration for inline muzzleloaders.
- The construction is specified as 100% copper.
- The package quantity is 15 rounds per box (as listed).
- Sectional density is given as .211.
- Ballistic coefficient is listed as .207.
- Manufacturer notes indicate high weight retention (typically 100%) and expansion to approximately double diameter.
Purpose-built for inline muzzleloader use with sabots, the Barnes Expander MZ delivers repeatable expansion characteristics and consistent shot-to-shot performance. Its copper construction and Expander MZ profile are intended to produce controlled, large-diameter expansion and reliable weight retention across a range of velocities, making it a practical choice for informed shooters seeking predictable terminal behavior from a muzzleloader projectile.









