brouhaha, reloading is not near as complicated as it seems to be when your getting started. When I was starting out, all the information out there got confusing. To answer your question. Yes, dies are standardized but the Dillon 550 requires the purchase of a caliber conversion kit for each caliber you wish to reload. You can get this kit from Dillon. They make kits for lots of calibers, if they dont list one specifically for the 338 Lapua, one for another cal. might work. Just call'um.
Hope this helps, m16
P.S. Just get the minimum to begin with, you dont need alot of fancy gizmos to make VERY good ammo.