The Hornady Lock-N-Load Comparator Body (part no. B2000) is the red comparator body from Hornady used with the O.A.L. Gauge to measure and set bullet seating depth precisely. It aligns the O.A.L. Gauge so you can take a direct, repeatable measurement with a caliper as you dial in your seating die for a specific bullet’s jump to the lands. This listing is for the comparator body only — caliber-specific bullet inserts that attach to the body are sold separately, so reloaders add the inserts they need for the bullets they’re loading.

Key Specifications

• Used with Hornady’s O.A.L. Gauge for precise seating-depth measurement.
• Aligns the gauge for a direct caliper reading instead of an indirect measurement.
• Works across any caliber once the matching bullet insert is attached.
• This listing is for the body only — bullet inserts are sold separately.
• Color: red.

Frequently Asked Questions

Does this include the bullet inserts? No — this is the comparator body only. Caliber-specific bullet inserts attach separately and are sold on their own.

What is this used to measure? It’s used with the O.A.L. Gauge to set bullet seating depth precisely, so you can dial in a specific bullet jump to the lands with a caliper.

Buy the Hornady Lock-N-Load Comparator Body

Add the Comparator Body to your O.A.L. Gauge setup so seating-depth measurements stay precise and repeatable. Order it from our Lubbock, Texas gun shop for quick, insured shipping, and browse our reloading equipment selection for the rest of your bench.