The Lyman Case Length Headspace Gauge 6.5 Creedmoor (LY-CG65C) is a precision-machined quality-control tool designed for handloaders who require absolute consistency and safety in their ammunition. Crafted from hardened steel, this one-piece, non-adjustable cylinder-type gauge allows shooters to rapidly inspect resized 6.5 Creedmoor brass before priming and loading. By simulating a minimum-tolerance chamber, the gauge ensures that each cartridge case meets strict SAAMI dimensions for headspace, overall length, and outer diameter, preventing chambering failures and potential firearm malfunctions. Key Features:

• Dual-Function Inspection: Simultaneously verifies both the headspace (measured from the case base to the shoulder datum line) and the overall case length.
• Stepped Mouth Design: Features high and low steps at the mouth end to provide an instant visual check of whether the case length is within tolerance or requires trimming.
• Maximum Diameter Verification: Ensures that the case body has been properly resized through the reloading dies and will chamber smoothly without sticking.
• Hardened Steel Construction: Machined to exact tolerances from durable metal to withstand repeated workshop use without wear or deformation.
• No Power Required: A purely manual, mechanical hand tool that operates without batteries, calibration, or electrical power.

Product Specifications:

• Manufacturer Part Number: LY-CG65C (Lyman Item # 7990346)
• Calibre Compatibility: 6.5 Creedmoor bottleneck rifle cartridge cases
• Material: Precision-machined hardened steel
• Gauge Type: One-piece, non-adjustable cylinder
• Packaged Dimensions: Approximately 1.30" x 2.70" x 5.00" (3.3 cm x 6.8 cm x 12.7 cm)
• Weight: Under 150 grams
• Power Requirements: None (100% mechanical)

Who It Is For:

This gauge is an essential accessory for Australian precision rifle shooters, long-range target competitors, and PRS (Precision Rifle Series) participants who rely on the highly popular 6.5 Creedmoor cartridge. Whether you are loading for a high-end bolt-action rifle or a permitted category-D action, achieving a consistent shoulder bump is critical for both safety and sub-MOA accuracy. It is also highly beneficial for Australian medium-game hunters who need absolute reliability in the field, ensuring that every handloaded round feeds, chambers, and extracts flawlessly under any conditions. If you want to eliminate the guesswork from your case resizing and trimming steps, this tool provides the necessary quality assurance.