Thanks for all the good info, all very helpful.
I have reloaded 30 rounds so far, 10 a couple days ago and 20 tonight. Out of the 30 I have 3-4 that are a little short on the COAL. Speer book says 2.175", the short ones are 2.168 +\- They are random threw out the run, I am using he same stroke on the press each time. Is this normal or something I should fix .
Calipers are a descent set from lowes (kobalt brand)
Speer 55gr sp. #1047
Remington .223 brass. (new)
IMR 3031. 24 gr