Hornady 7140 Crimp-On Gas Checks .45 Cal Cast Bullets 1000/Box

The Hornady 7140 Crimp-On Gas Checks protect cast bullet bases from hot propellant gases while improving accuracy and extending barrel life. These precision-formed copper cups prevent gas cutting and lead fouling that degrades performance in high-velocity loads.

What Makes This Different

Unlike standard wax lubricants that burn away under pressure, these copper gas checks create a physical barrier between the bullet base and combustion gases. The crimp-on design ensures secure attachment without requiring special sizing dies or complicated installation procedures. Hornady's manufacturing process produces consistent wall thickness and precise dimensions that maintain concentricity during firing.

Key Features

• Precision-formed copper construction resists deformation under high pressure
• .45 caliber sizing fits cast bullets from .452" to .454" diameter
• Crimp-on attachment method works with standard reloading equipment
• 1000-count bulk packaging reduces per-round cost for high-volume shooters
• Uniform wall thickness maintains bullet balance and flight stability
• Compatible with both hard cast and soft lead alloy bullets
• Works with powder charges up to maximum SAAMI specifications

These gas checks prove particularly valuable for competitive shooters pushing cast bullets to higher velocities where accuracy matters most. The copper barrier prevents the gas cutting that causes flyers and maintains consistent bullet weight by eliminating lead vaporization. Hunters using cast bullets in .45-70 Government and similar cartridges see improved terminal performance when gas checks allow higher impact velocities without accuracy loss.

Technical Specs

• Caliber: .45 (fits .452"-.454" bullets)
• Material: Precision-drawn copper
• Attachment: Crimp-on design
• Quantity: 1000 pieces per box
• Compatibility: All .45 caliber cast bullets with appropriate base design
• Maximum velocity: No specified limit with proper installation
• Country of origin: United States
• Manufacturer part number: 7140

Serious cast bullet shooters recognize gas checks as essential components for achieving rifle-grade accuracy from handgun cartridges. This bulk packaging provides enough components for extensive load development while maintaining the quality standards that competitive shooters demand.