I have been reloading since the early 80s, and have wanted to get a chrono for some time. Got one a few weeks ago. Why did I wait so long? It is 2nd in importance only to a press for a reloader, IMHO. I got one of the ProChrono units from Amazon on a scratch and dent deal. 85 bucks delivered. This thing far exceeds my expectations. Easy to use, and works fine even without the sky screens. I found most of my loads did what the manuals said they would, but one needs to be toned down a bit. For loading bullets with no exact match in the load tables, the chrono is invaluable. Plus, I have data I can count on for my ballistics tables for my scope and various bullets.