Ensure that all ammunition is within specifications before participating in a critical match. A single tool is available to verify four popular calibers used in Cowboy Action shooting - .357 Magnum, .44-40 Cal, .44 Magnum and .45 Long Colt. This tool assists in preventing jams, misfires, feeding issues and other malfunctions caused by ammunition that is out of specification, which could result in the loss of valuable points or the entire match. It is constructed from machined aluminum with check holes that are precision bored using high-quality Clymer reamers.

Our case gauge ammo checkers are precision-engineered from solid 6061-T6 aircraft-grade aluminum, ensuring superior durability and performance in demanding environments
Our precision-engineered gauges are meticulously crafted to adhere to the SAAMI minimum specifications, ensuring optimal compatibility and performance across a wide range of applications
While certain manufacturers employ standard boring bars for chamber checker production, we utilize authentic Clymer reamers, identical to those used in precision barrel chambering processes
Anodized matte black finish for enhanced durability
The Cowboy case gauge is engineered with a precise height measurement of 1.60 inches, ensuring optimal compatibility and accuracy for your technical requirements
The SAAMI specification dictates that the maximum cartridge length for a .357 Magnum is precisely 1.590 inches
The maximum specified cartridge length for the .44-40 Winchester, as per SAAMI standards, is precisely 1.592 inches
The maximum cartridge length specification for the .44 Magnum, as per SAAMI standards, is precisely 1.61 inches
The maximum cartridge length specification for the .45 Colt, as per SAAMI standards, is precisely 1.60 inches

Report incorrect product description

Reviews

Q & A

Retail Stock

Compliance

Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).