Sinclair stainless steel neck turning mandrels are precision-made from high-grade stainless steel for 17 to 50 caliber cartridges, with turning mandrels sized .002 inch under bullet diameter.
The mandrels are the result of extensive experimentation by experts, with carbide options available that offer even tighter tolerances for more consistent adjustments.
Large caliber mandrels (35 to 50 caliber) are compatible only with the Large Caliber Expander Body and NT-5000 Turning Tool, ensuring specialized support for larger cartridges.