RCBS Small Base Die Set – Group A – Popular Rifle Cartridge .300 Win Mag

Overview

The RCBS Small Base 2-Die Set in 300 Winchester Magnum is engineered specifically for reloaders producing ammunition for semi-automatic, pump-action, slide-action, and certain lever-action rifles where tight chambers demand reliable feeding. The set includes a small base sizer die with an expander-decapping unit and a regular seater die equipped with a bullet seater plug and built-in roll crimper. The small base sizer sizes cases slightly smaller in diameter and sets the shoulder back further than standard full-length sizers to ensure the resulting cartridges chamber properly every time. These dies are not recommended for bolt-action rifle ammunition, and shellholders are sold separately.

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