I'm using the ballistic calculator that is at the top of this sub catagory. I used info for my area, 1000ft elv, 30 degrees (typical hunting temps), no place for humidity info. Since I don't shoot the 180s, I picked 3070fps as an average velocity from the Nosler manual and used that. Used 2970 fps for the 200s( what mine run).
At 800 yds the program shows both bullets drop 17.8 moa, after that the 200 gr starts to take over, admittedly by not that great a margin. Interesting though the difference between programs and info used.
I don't know if this program is as good as, better than, or worse than exbal, but thats where my numbers came from. Guess thats my story and I'm stickin to it.