Thanks you guys...great info. Pure Havoc....you were scaring me for a minute there with 24ft of drop @ 1000yds........ you used ft quite a few times. You meant inches right?
Well.........yes and I agree about the .308 follow up shot ability...AND the fact that it's my understanding the TallySpam (just made that up-not sure if it makes sense....but I'm going with it for now) and other Middle Eastern fighters have sussed out the effective range of the 5.56 and will often attack just beyond 300yds and from elevation. The .308 sorts that problem out.
This issue of the cartridge raises a problem for me. .300 Win Mag. .338 Lapua and .50 etc ...I'm sure the 6.5 rounds.....these are not cheap. In fact match rounds are hellish expensive. Considering I will have a year or so of plentiful practicing needed.....I cannot afford that. I really can't. I could go to reloading, but now the time factor and even so.....it will still be expensive.
The reason I wanted to go .308 is the availability of the cartridge, the price/quality options, the widespread use in the field and also the fact I could have two platforms, one cartridge.
If the AR-10 is going to be something that works out to 500yds and the bolt something not much further than that.......maybe the AR is the way to go. perhaps put what I can into building a nice one....and keep my eye open for a used entry level bolt action in a better cartridge while getting my ballistic skills down on the autoloader.
I have several iPhone ballistics apps.
Also, this online one does wind. I hope posting the link is okay. Sorry if not, mods just remove if need be.
It's free, you have to register.