Lee Press Shellholder R-13 -

The Lee Press Shellholder R-13 is a precision reloading component designed for shooters and ammunition loaders who demand consistency and reliability in their handloading operations. This shellholder is engineered to secure .357 Magnum, .38 Special, and related cartridges during the full spectrum of press operations—from sizing and decapping through priming and powder charging. As someone who has spent years fine-tuning reload recipes, understanding the critical role of proper shellholder fit is essential to achieving safe, accurate ammunition that performs predictably downrange.

The R-13 shellholder features a machined steel construction that locks cartridge cases firmly in place without deformation, ensuring precise alignment with press dies and eliminating runout that degrades reload quality. The design accommodates the specific head dimensions of magnum and standard .357/.38 cartridges, providing a snug, indexed fit that prevents slippage during ram stroke cycles. Lee's engineering prioritizes durability; this compact component (3.7 × 0.65 × 4.95 inches, weighing just 0.05 lbs) is built to withstand thousands of reloading cycles without wear, maintaining critical tolerances that directly influence cartridge concentricity and primer seating depth consistency.

The Lee Press Shellholder R-13 is ideal for any reloader running Lee progressive or single-stage presses with standard shellholder compatibility—whether you're loading target rounds for precision work or defense ammunition for duty or personal protection use. Installation is straightforward: it seats directly into your press's shellholder post, and the indexed design ensures repeatable cartridge positioning for every stroke. If you're developing loads for revolvers chambered in .357 Magnum or .38 Special, or building ammunition that demands uniformity, this shellholder is a non-negotiable investment in load quality and press reliability.