Lyman Tumbler Media - Treated Corn Cob Plus 2-lbs.

Lyman Tumbler Media - Treated Corn Cob Plus 2-lbs. is a premium polishing medium designed specifically for reloaders who demand clean, inspection-ready brass cases. Whether you're processing heavily tarnished or moderately dirty cartridge casings, this specially treated corncob formula delivers consistent results that prepare ammunition for safe and accurate reloading. Serious handloaders and competitive shooters rely on quality tumbler media to restore brass to factory condition without damaging case integrity.

The media achieves its cleaning and polishing action through a combination of finely processed corncob particles and specialized surface treatment that accelerates oxidation removal. When used in a Lyman Turbo Tumbler, the abrasive action works across all case surfaces—inside and outside—to eliminate tarnish, primer residue, and atmospheric discoloration in just a few hours of tumbling. Unlike untreated corn media, the Treated Corn Cob Plus formulation is engineered to be more effective on difficult fouling while maintaining consistent particle size for uniform results across large batches of brass.

This 2-lb. box works best for reloaders processing between 500 and 2,000 rounds per tumbling cycle, making it ideal for both hobbyists and high-volume precision shooters. The media is compatible with all Lyman tumbler models and performs reliably across all common rifle and pistol calibers. After tumbling, brass emerges polished and ready for sizing, priming, and powder charging—eliminating the need for costly sonic cleaning or manual case preparation.