Question for you DTA SRS owners. I have a DTA SRS in .308 Win on it's way to me. I was wondering what DTA scope mount I need? I'm planning on mounting a SWFA SS 5-20x50 FFP. Should I go with 20, 30 or 40 moa? Planning on purchasing a .260 Rem barrel soon as well. I'll be shooting from 100-900 yards.