The email issued mentioned earlier this week is now fixed! You may also have received previous emails that were meant to be sent over the last few days - apologies, this was a one time issue and shouldn't happen again!
Depends what you are shooting, and what you like really. I like 100 because I try to stay standard for everything I shoot. BUT if you will only be taking long shots, something different may work better for you.
I am wanting to shoot between 1 - 1 1/2 miles. The scope is a Leupold Mark IV 16x40 with a tactical reticle. It has 140 total vertical moa (the reason I bought it) and I believe the scope base is 20 moa.