SINCLAIR INTERNATIONAL GENERATION II LARGE CALIBER EXPANDER DIES

Large caliber die body for use with our large caliber mandrels.

Expander dies are an essential companion to neck turning tools. They enable the expander mandrel to produce the correct fir of the case neck on the neck-turning mandrel which is vital for accurate, easy neck turning. Expander dies and mandrels can also “iron out” dinged case necks, set consistent case neck size for uniform bullet tension or to “neck up” cases one caliber at time for wildcat cartridges.

Our Generation II Expander Dies completely capture the mandrel within the die so the mandrel cannot pull out. An O-ring in the die allows the mandrel to float a bit and find its own center within the case neck. All three Generation II dies are precision machined from stainless steel and the 7/8”-14 dies include the Sinclair Stainless Steel Split Lock Ring. Large caliber dies accept only .35 to .50 caliber mandrels. All single ended Sinclair mandrels will fit the Generation II expander dies.

All expander mandrels for Sinclair Expander Bodies are sold separately: Find Mandrels here.