Sinclair stainless steel mandrels are precision-turned from high-grade stainless steel, with turning mandrels sized .002 inch under bullet diameter for optimal performance.
The mandrels have been developed through extensive experimentation by expert handloaders, ensuring high-quality shape and surface for better reloading.
Large caliber mandrels (35 to 50 caliber) are designed specifically for the Large Caliber Expander Body and NT-5000 Turning Tool, enhancing adjustment consistency and accuracy.