The RCBS Chamber Case Length Gauge for .300 Winchester Magnum (RCBS part no. 88287) is a simple, purpose-built tool that lets handloaders quickly check the case length, diameter, and overall cartridge length of their handloaded .300 Win Mag ammunition. Checking these dimensions against SAAMI spec before shooting or storing finished rounds catches sizing or trimming errors before they become a chambering problem at the range.

Key Specifications

• Built specifically for .300 Winchester Magnum cartridge dimensions.
• Checks case length, diameter, and overall cartridge length in one gauge.
• Designed for quick verification of handloaded ammunition dimensions at the bench.
• Measures approximately 1.8 inches overall, a dimension handloaders can check against magazine length and seating depth.
• Ships at a packaged weight of approximately 0.34 lb, useful for estimating freight on larger orders.

Frequently Asked Questions

What does this gauge check? It checks case length, diameter, and overall cartridge length of handloaded .300 Win Mag ammunition.

What cartridge is this gauge built for? It’s built specifically for .300 Winchester Magnum.

Buy the RCBS Chamber Case Length Gauge, .300 Win Mag

RCBS builds simple, purpose-specific tools that catch handloading errors before they reach the range. Shop our case preparation selection and order today for fast, insured shipping from our Lubbock, Texas shop.