As I read a lot of postings similar to this one I never cease to be amazed at the amount of people that have problems placing a shot where they wish at distances of 500 to 600 yards. Either they don't know the first thing about proper marksmanship procedure or they have 'boat anchor' material for rifles!! Here's a simple hunting rifle in .308 Winchester that is a 'hammer' at the above distances!

[Linked Image]Hunting Rifle by Sharps45 2 7/8, on Flickr

Even birds know not to land downwind!