i was in my shop earlier on this week and talking to an ex-scout about thousand yard comp. he's the only person within driving distance that i kno who shoots that far. anyway, he said that he has his 308 sighted in for 200 and always leaves his scope on 12x power. however on demigodllc.com, they all shoot practical 1000 comp and reccomend a 100yrd zero. i cant remember why and i am too lazy to search it out right now. but can anyone tell me the advantages of a longer zero?