The BL 550 is essentially an RL550B without the automatic priming and powder systems. Capable of loading more than 160 calibers- just like the RL550B- it uses any manufacturers' standard 7/8"-14 reloading dies. It's priced comparably with other manufacturers' turret presses; yet unlike them, it's fully upgradeable to Dillon's Progressive RL550B loader!
The interchangeable toolhead makes it quick, easy and inexpensive to change calibers. For example, if you load 30-06 for elk, .243 for deer and .22-250 for coyote, you don't even have to change the shellplate. You simply pull two pins and swap the toolhead with your 30-06 dies to another toolhead with your .22-250 or .243 dies in less than 30 seconds! The additional toolheads are inexpensive- if you load for several rifles it's a no-brainer! Once you get your dies set you'll never have to re-set them.
A powder measure adapter is available if you want to use a manual measure that you already own. Or, if you want to weigh every powder charge you load, it's easy- you can use a powder trickler with the powder die/ funnel assembly that comes with the BL550. Reloading dies and caliber conversion kit are sold separately- order RL550B caliber conversion kits.