Thanks for the info all. Kraig, your zero will help a lot, sounds pretty close to mine considering I finally found my rather sparse notes, my 500 yd zero was chasing between 8-9 up from my 200 and I see I was conceited enough to think I could see the 1/2 difference with my hood. So, if 9 at 500, +12 sounds good for 600. Hard to get info at the match, probably only be a dozen of us shooting .308. Sad poodley times we live in. Oh well, the big boy ammo line at the truck is lots shorter. Being forced to shoot free M118, the horror.