Lyman Medium Corncob Plus (4.5 lb) – Brass Cleaning Media for Tumblers

Overview

Lyman Medium Corncob Plus is a natural, purpose-built media designed to refresh brass cases used in reloading. Crafted from processed corncob and treated for consistent performance, this media helps you clean and lightly polish cases in a tumbler, turning dull brass into ready-to-reload components with minimal fuss. This listing notes a 4.5 lb option, while Lyman also offers various weights in the Corncob line, including larger containers. Packaging can vary by weight, but the core idea remains the same: a mild, effective cleaning media that supports brass preparation steps without harsh abrasion.

Key benefits at a glance

• Natural processed corncob composition provides gentle cleaning action that is tough on grime but soft on brass.
• Effective for cases with minor tarnish, helping restore a uniform finish without marring the surfaces.
• Reusable for multiple tumbling cycles, offering value across several reloads.
• Can contribute to longer life for brass and reload dies by supporting careful cleaning practices.
• Best suited for cleaning dirty and tarnished cases when used in a proper tumbler setup.
• Typically polishes brass within a few hours, depending on workload and tarnish level.
• Treated corncob composition adds consistent performance across sessions.
• Contained in a clear jug with a pour handle for easy measurement and control.
• Available in multiple weights to fit different batch sizes and storage needs.

Real-world use cases include prepping brass for reloading sessions, restoring a more uniform appearance to once-dull cases, and providing a reliable step before final sizing. The media is designed to work within a Lyman Turbo Tumbler system, aligning with common reloading workflows and timeframes.

How to use (general guidance)

• Place the brass cases and corn-cob media into the tumbler per manufacturer instructions.
• Operate the tumbler for the recommended cycle length, then inspect the cases for desired brightness.
• Rinse and dry the brass to prevent moisture-related issues before lubing or resizing.
• Reuse the media in subsequent sessions, following care and cleaning guidelines to maximize life.

Whether you’re refreshing a mix of tarnished brass before loading or maintaining a steady cadence of case prep, Lyman Medium Corncob Plus offers a balanced, approachable option. While outcomes depend on variables like tarnish level and session duration, many users report noticeable improvements in brass appearance and feel after a few hours of tumbling with this media.