All that CatShooter said...I've loaded handgun ammo for years and use a progressive press to do so...Fortunately, I have my seating dies adjusted where it just barely crimps the case neck in the same operation, at the end of the seating cycle,,,If I change bullet configurations for that die/caliber, I have to start all over again..
It takes a lot of experimentation to get it right, especially on rounds that are intended for use in a semi-auto pistol, where the round headspaces on the case neck... Revolvers are not quite so 'picky'..
Find yourself a "Check Die" that you can run the finished cartridge into to verify that it is sized properly and you won't need to be worrying about the actual size of the cartridge components..I have one for almost every cartridge I load..If it slides in and out easily, you have no problem,, If it doesn't, then you will know that you need to do some more adjustment..
