Quoted:
What are your thoughts on the Dillon RL 550B ?
They're great for bulk loading. I've never used one, however, I hear they are fairly difficult to set up and to change loads or calibers. The couple guy I know who have them set them up for one load, like 45 acp...and leave them set up for that round. They have duplicate machines for other calibers.
With the Rock Chucker set up, changing calibers is very easy and straight forward. IMHO the advantage is it allows you easily do load development.
I can load 100 .308 M-118LR clones in an hour and those are with weighed charges. Then I can load up bulk .223 blasting ammo without changing the entire machine...I just change the seating die and shell holder. I can do twice as man in an hour using the powder drop without checking each charge on the scale.
I guess it really depends on if you want to load blasting ammo in bulk or precision ammo.