The Lee Pro Auto Disk Measure is as accurate as measure measure I’ve used. Combined with the Powder Through Expansion Die and you have an unbeatable value for straight wall rounds. Want to fine tune your load, the Adjustable Charge Bar makes it as easy as removing a disk and dropping in the ACB. If you load magnum powder volumes the very simple Double Disk Kit literally doubles the measures range. With the proper non expansion adapter it can be used to charge bottleneck cases. I say this with 20 plus years experience using them. When I say them, I mean them. I own 6+ of the Pro Auto Disk Measures. I leave them along with a few Lee Auto Drum measures setup on my most often used handgun calibers loaded using a Lee Classic Cast Turret press and two Pro 4000 progressive presses. I don’t believe there’s a measure on the market regardless of price that comes close to competing with the Pro Auto Disk Measure.