I run the blue 550 and have no troubles with it. That said, I also have experience with the Ammo Plant. Both will work well, both have their quirks, BUT, Hornady stuff is FAR more commonly available than ANYTHING from Dillon. Just look around at how many stocking Dillon dealers there are. I'll tell you, not many. Lots more dealers with Hornady stuff. It really boils down to do you drink the blue koolaide or not? Make a choice, they both work well.