Since there are a number of cartridges that Dillon doesn't list but that I load for, thought you might find this info useful. For the 550: the 221 FB and 17 FB both use shell plate 3, locator buttons are #3 and the powder funnels are the 22 cal, A funnel, and 17 cal, O funnel, (same as 17 Rem) respectively if that helps. 17FB data will work witth 17 MK4. 20 Vartag uses 3 shell plate, #3 locator and 204 powder funnel. 17 AH and the just released 17 Hornady Hornet, use E shell plate, #8 locator buttons and 17 caliber powder funnel.
Awesome app. Thanks. Really think this should be tagged as a sticky.