Lyman’s Pro Headspace Gauge for .223 Remington and 5.56 NATO (brand part no. 7705100) is a caliber-specific gauge built to verify that a resized bottleneck case falls within the safe minimum and maximum headspace range before it’s loaded. Checking headspace after resizing is a standard safety and accuracy step for bottleneck rifle brass, and a dedicated gauge takes the guesswork out of the inspection. For reloaders standardized on Lyman case-prep gear, this reloading gauge is a quick headspace check for .223 Remington and 5.56 NATO brass.

Key Specifications

• Sized for .223 Remington / 5.56 NATO brass.
• Used to verify a resized case falls within the safe minimum and maximum headspace range.
• Measures 4.5 inches in overall length.
• Ships at a 0.25-pound shipping weight.

Frequently Asked Questions

When should I use this gauge? After resizing .223 Remington or 5.56 NATO brass, to confirm headspace is within the safe range.

What caliber is this gauge built for? .223 Remington, also rated for 5.56 NATO.

Buy the Lyman Pro Headspace Gauge, .223 Remington

A quick check with this Lyman gauge confirms .223 Remington and 5.56 NATO brass is safely within headspace spec after resizing. Order it from our Lubbock, Texas gun shop for fast, insured shipping.