Advice? 20 moa mount for 7.62 sub-loads?

[dobarker]

As some of you know, I am working on building a .308 that will eventually be used to mount an aac suppressor on. The load I will be using will belt a 200-220 grain bullet out at around 950-1000fps, i've calculated drop to be about 20" at 100 yards. The rifle itself with suppressor installed won't be used to shoot at much anything past 200 yards.

My question is: Should I buy a mount with an added 20moa? Or will there be enough adjustment in a average scope with a 55moa range of adjustment?

Thanks in advance.