The Redding Instant Indicator Headspace and Bullet Comparator (MPN: 27531) is a dedicated precision measurement tool designed for the .260 Remington cartridge. Built around standard 7/8"-14 reloading press threading, this mechanical comparator provides fast, direct comparative measurements without requiring vernier calipers. Handloaders can install the die body directly into a standard single-stage or turret reloading press to verify shoulder bump after full-length sizing, inspect cartridge base-to-ogive (CBTO) bullet seating uniformity, sort raw projectiles, and detect overall case trim length variances.

Key Features

• Mechanical Dial Indicator: Features direct-reading graduations in 0.001" increments with standard 1.0" travel for precise comparative analysis against a zeroed datum.
• Accurate Shoulder Bump Measurement: Compares fired brass to resized cases using a shoulder contactor to verify sizing die setup within 0.001".
• Base-to-Ogive Seating Verification: Measures seating depth against the cartridge ogive rather than the tip, bypassing tip deformities to ensure consistent cartridge base-to-ogive (CBTO) alignment.
• Standard Press Mounting: Uses standard 7/8"-14 outer threads for direct installation into standard single-stage and turret reloading presses.
• Complete Calibre Kit: Includes the die body, mechanical dial indicator, bore diameter bushing, surface contactor, shoulder contactor, and a headspace set-up gauge.
• 100% Mechanical Operation: Requires no batteries, mains power, or electrical supply for workshop or bench use.

Specifications

• Brand: Redding Reloading Equipment
• Manufacturer Part Number (MPN): 27531
• Calibre Compatibility: .260 Remington (20° shoulder angle profile)
• Mounting Interface: 7/8"-14 threads
• Indicator Resolution: 0.001"
• Dial Indicator Travel: 1.0"
• Power Requirements: None (Fully mechanical)

Who is the Redding 260 Remington Instant Indicator Headspace And Bullet Comparator for?

• Precision .260 Remington target reloaders and hunters — Installs via standard 7/8"-14 threading to verify shoulder bump and bullet seating depth consistency to within 0.001" resolution on this reloading headspace and bullet comparator.

Less suitable for: Handloaders processing cartridges with shoulder angles other than 20° (such as a 6.5 Creedmoor with a 30° shoulder or 6.5 PRC); these require a cartridge-specific headspace comparator model matching that specific case geometry.