20 Caliber Neck Reamer by RCBS RELOADING PRODUCTS Product Overview now offers the RCBS 20 Caliber Neck Reamer. The 20 Caliber Neck Reamer is for trimming the inside of case necks to ensure uniform thickness and concentricity. Teh 20 Caliber Neck Reamer works in conjunction with the RCBS Case Neck Turner and available separately. For use with RCBS Case Neck Turner Made of steel
