Yes, but really because I reload ammo. My digital calipers have come in handy at bike shops because they save me a trip. How many times have you all been told by your LBS, "yeah, this should fit fine," only to find out it doesn't when you get home? Now that I'm going to start building my own rims, the calipers will come in handy with hub measurements as well. You gotta make sure the factory specs are correct, as we've found out with the Nashbar hubs.