I have the Dillon 650, the Redding SS, and have went to quite an expense, for perfection, in three AR-15 builds. But, at the moment, my ProChrono digital from Competition Electronics has filled notebooks full of very useful information. It has worked well!

One reply referred to $100 Chronos as a device for casual reloaders, while the $500 units are for the serious. I don't agree with that assessment. I've used the ProChrono as a serious piece of equipement, to obtain the information I needed. The ProChrono is far more dependable than not. Someday, perhaps a more expensive unit. But probably not. I have this thing about expensive triggers & barrels for ARs. Oh well.....