Diameter and profile is what I look at vs what the bullet is supposed to used for. .380, 9mm and .357sig if the jacketed bullets are .355"-.356" and a profile that will work I load them up. You could use even larger diameter say .357" jacketed bullets if the load is worked up properly but I don't go that large with jacketed in the forementioned calibers.
Every once in a while I will load up some 90gr XTP bullets (I use them for .380) in .357sig and launch them well over 1500fps.
Last edited by dkf; 03-09-2013 at 10:58..