Olympic arms reloads

[Colohunter]

Hello, I have an Olympic Arms 300 Fireball on order from Midway. I already got the Redding dies and trim die. I started sizing some brass and wanted to hear what dimensions others were using, especially those with Oly arms uppers. I sorted through my 223 brass and noticed that I had a little over 300 pieces of PMC brass that someone had given me, so I decided to start ther with forming. So far I have the following dimensions:

The neck was about .0105-.011" thick, compared to the 223 brass that was .0100-.0105", before trimming.
The neck diameter with a bullet seated was .331" compared to the Sierra manual maximum of .344" This is a little encouraging that I may not have to turn the necks, though I will have to wait and see when the upper arrives.
I seated the 220gr bullet with an OAL of 2.260" and the 125 gr to 2.050"

So far these are just dummy rounds, I am waiting to load anything with powder until I get the upper in to test the dummy rounds in. How does that compare to those of you with Oly arms uppers?