I have 69 grain Black Hills Sierra HPBT Matchking with a BC of .301 going 3040 fps. Those are calculated at 41.8 MOA.
Then I also have Hornady 55gr SP, with a BC of .235. With those, it says I need 50 MOA, so those are a stretch. The 55gr V-Max though has a BC of .255, which is coming in at 45.1 MOA.
These are all at 500 foot elevations. I do a lot of shooting over in Central Oregon, where the elevation gets a lot higher, so the MOA requirements for these distances would all go down.
All in all, I am excited to get into this sport.
Sounds like you have it covered. Never shot those 69 grainers from BHs. Heard they were great at distance. Of course, I really don't have much experience with the 223 outside of the M-16, M-4, Mk12 and Mk18.
Let us know how it goes. Sounds pretty cool to me!