After many years of using a Hornady trimmer I bought me a CTS case trimmer and man! Why did I wait so long? Chuck it in your drill press or just in your battery drill. Takes about 2-3 seconds per case to trim. No pilot or shell holders needed. With the same tool I can trim all my cases that use brass in the .222 family. So I am using it for my .17 Remington, my .221 FB, my .204, my 223 and my .223 AI. Changing it from one caliber to another takes less time than it is taking me to type this.
Youtube CTS Case Trimmer and you will see what I'm talking about.