Our Case Gauge Ammo Checkers are machined from solid 6061 T6 aircraft grade aluminum.

Our gauges are made to SAAMI miniumum spec.

While some companies use boring bars to make chamber checkers, we use the actual Clymer reamers that are used to chamber barrels.

Anodized matte black for durability.

Measures min case diameter.

Measures max overall length.

These 50 hole chamber checkers do not line up with plastic factory ammo trays.