Sinclair International's stainless steel neck turning mandrels are precision crafted from high-grade stainless steel for 17 through 50 caliber cartridges, ensuring consistent adjustments and tighter tolerances, especially with carbide mandrels.
The 17 caliber stainless neck turning mandrel is sized at 0.170 inches in diameter, which is .002 inch under bullet diameter for optimal performance in the NT-4000 turning tool.
Large caliber mandrels, ranging from 35 to 50 caliber, are designed to fit only the Large Caliber Expander Body and NT-5000 Turning Tool, catering to a wide range of cartridge sizes.