Lyman Case Head Space Gauge .204 Ruger

The Lyman Case Head Space Gauge for .204 Ruger (brand part no. 7990342) is a precision inspection tool from Lyman used to check case headspace after resizing this bottleneck cartridge. The reloader simply inserts a resized case into the gauge to ensure it does not exceed the maximum or fall below the minimum allowable headspace; the gauge will identify any case that exceeds the max. Any case found with excessive headspace should be destroyed immediately rather than loaded and fired again.

Key Specifications

• Sized specifically for .204 Ruger bottleneck brass.
• Checks that resized cases have not exceeded the maximum safe headspace dimension.
• Also flags cases that fall below the minimum allowable headspace.
• Lyman recommends destroying any case that fails the gauge check rather than reloading it.
• Part of Lyman’s broader case length/headspace gauge lineup, which covers dozens of individual rifle cartridges.

Frequently Asked Questions

How does this gauge work? Insert a resized case into the gauge to confirm it falls within the minimum and maximum allowable headspace.

What should I do with a case that fails? Destroy it immediately rather than attempting to reload it.

What cartridge is this gauge for? .204 Ruger specifically.

Buy the Lyman Case Head Space Gauge .204 Ruger

Add the Lyman Headspace Gauge for .204 Ruger to your next order of reloading equipment. Ships fast from our Lubbock, TX gun shop.