The Hornady Lock-N-Load Headspace Bushing, .400-Inch (brand part no. D400) is an interchangeable bushing for use with the Hornady Lock-N-Load Headspace Comparator, which lets a reloader precisely measure a case’s headspace dimension while sizing it for a proper fit in any firearm. This .400-inch bushing covers cases such as .43 Winchester, 7mm-08 Remington, .308 Winchester, 7mm STW, and .260 Remington, and swapping bushings on the Comparator extends brass life, improves accuracy, and enhances safety by catching an over-sized or under-sized case before it goes into a chamber. The bullet comparator body and calipers used alongside this bushing are sold separately.

Key Specifications

• Interchangeable with the Lock-N-Load Comparator swaps onto Hornady’s Headspace Comparator body for quick bushing changes.
• .400-inch bushing size covers cases including .43 Win, 7mm-08 Rem, .308 Win, 7mm STW, and .260 Rem.
• Extends brass life and improves accuracy catches over- or under-sized cases before they go into the chamber.
• Shipping weight of 0.085 lb gives a quick reference for order weight and shipping planning
• Comparator body sold separately this bushing is the interchangeable wear part; the Comparator body and calipers are purchased once.

Frequently Asked Questions

What cases does this .400-inch bushing cover? It covers bottleneck cases such as .43 Winchester, 7mm-08 Remington, .308 Winchester, 7mm STW, and .260 Remington.

Does this bushing come with the Comparator body? No, the Comparator body and calipers are sold separately.

Buy the Hornady Lock-N-Load Headspace Bushing, .400-Inch

Order the Hornady Lock-N-Load Headspace Bushing, .400-Inch from Hornady to keep your headspace checks precise. Pick it up from our Lubbock, Texas gun shop. Browse our reloading equipment lineup for more.