How do you handle the case length trimming thing on the 550?
That's what's kept me from using mine for this caliber.
I use the Dillon RL550B for the .223. It is fantastic!
Here, is my procedure.
First, after lubing with Dillon's lube, I re-size and deprime the cases on my RCBS Rockchucker, using RCBS 'Competition Dies'. (I usually do a batch of 200-300 cases.)
Next, back into the tumbler to remove the lube. (I use two tumblers. One with new/fresh media to clean, one with OLD media to remove lube.)
Now, clean the flash holes and clean the primer pocket w/ the RCBS tool.
Case inspection is done in this process, too.
Trimming is done on a table-top drill press with the Lyman trimmer adapter permanently bolted to the drill press table.
(Drill press is EXTREMELY accurate for trimming!!!!!)
After trimming and de-burring, it's back to the Dillon.
Size die is NOT in station 1. It is not needed.
Prime in station 1 only.
Proceed with loading sequence on Dillon.
After the initial prep work is done, loading goes fast.
I use H-335, and it meters like a dream in my machine. The powder charge is extremely uniform.
I'll check the powder charge every case for the first 10 or so, just to make sure everything is 'normal'.
After the serious production starts, I'll check every 25 to 50 cases.
This measure stays 'spot on'.
Very consistent loads. Once the loading has gotten to the Dillon, all of the prep work pays off. I'm done in short order w/ the Dillon.
Thanks for reading.