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Item #:HRNHK66
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Read 3 Reviews

Product Information

The L-N-L Headspace Gauge is the best method we’ve found to extend brass life, improve accuracy, and enhance safety. The gauge measures variations inyour brass before and after firing or re-sizing. It allows for comparison between fire-formed brass from your gun and your re-sized brass. Any of five interchangeable bushings are attached to your caliper using the same body as foundon our Bullet Comparator.

The five bushings that come with the L-N-L Headspace Gauge provide the ability to check most bottleneck cases, from .17 Rem through the belted magnums. Ackley Improved chambers use the same bushing size as the parent case. See chart provided or consult product instructions for cartridge/bushing size details.  Dial Caliper sold separately.


  • Comparator body
  • 5 bushings B-2000 Gage
  • Allen wrench


WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to -

Read 3 Reviews - Average Rating: 4.7 stars

Going to need this.

By Steven W. on Dec 03, 2020
Been loading pistol for a few years without one, but am loading rifle rounds now. Needed for 5.56, 300 Win Mag and 45-70 Gov't. and what ever else come along.

Hornady Case Comparator

By Jon M. on Nov 23, 2020
I’ve only used it for measuring headspace on .223. It works well and is repeatable once you get the case squared on the caliper. It made setting up a sizing die easier than using a case gauge since you can see exactly how far to bump the shoulder back.

Hornady Case comparator

By Daryll S. on Oct 17, 2019
Works as advertised. Helps set up FL sizing die for consistent shoulder bump
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