The Lee 40 S&W/10mm Auto Breech Lock Carbide Micrometer 4-Die Set (Lee part no. 91937) includes color-coded quick-change bushings, a Carbide Full-Length Sizing Die, a Powder-Through Expanding Die, a Micrometer Bullet Seating Die, and a Carbide Factory Crimp Die, plus a Universal Shell Holder, powder dipper, and instructions with load data. The same dies can load 10mm Auto by backing the bullet seating die and powder-through expanding die out about 1-3/4 turns, and can also handle 41 Action Express with roughly two turns of adjustment, though the included load data does not cover 41 AE and must be sourced separately.

Key Specifications

• Uses color-coded quick-change bushings for fast die identification.
• Includes a Carbide Full-Length Sizing Die, no case lube needed.
• Includes a Powder-Through Expanding Die.
• Includes a Micrometer Bullet Seating Die for repeatable seating depth.
• Includes a Carbide Factory Crimp Die.
• Comes with a Universal Shell Holder, powder dipper, and load data instructions.
• Can also load 10mm Auto or 41 Action Express with minor die adjustments.

Frequently Asked Questions

Can this set load 10mm Auto? Yes, back the bullet seating die and powder-through expanding die out about 1-3/4 turns to load 10mm Auto with this set.

Does the included load data cover 41 Action Express? No, the load data included with these dies cannot be used for 41 Action Express; that data must be obtained separately.

Buy the Lee 40 S&W/10mm Breech Lock Carbide Micrometer 4-Die Set

Cover 40 S&W and 10mm Auto reloading with one adjustable, carbide four-die set. Order it from our Lubbock, Texas gun shop, where our gunsmithing tools selection stocks Lee Breech Lock dies for popular pistol calibers, with fast shipping to your door.