I have collected about 15 manuals over the years and I like the Lyman and Sierra manuals the best. I really like Sierra's spiral binder that allows for updates and additions. As Eldequello, I own the PO Ackley vol's 1 and 2 and consider them nearly essential. For starters....I'd pick up the Sierra Vol 5 which has all the currest WSM's and Ultra Mags and a number of wildcats too. If you run into a non-listed caliber, just call the Techs at Sierra and they will eMail you their data....I recently did this with my 6-284. Regards, Rick.