Dillon Precision RT1500 Case Trimmer609824621646 The RT1500 Electric Case Trimmer is designed to handle the heaviest trimming jobs, including converting 223 Remington into 300 AAC Blackout. The RT1500 makes short work out of trimming large quantities of brass. The RT 1500 trim die is used just like a standard size die. The big difference is that while you are pushing the case into the die to size it, a 1 4 horsepower electric motor driving a carbide cutter is trimming the case to