If you want to shoot out to 1000 yards you should seriously consider spending a little bit more (700-800 dollars) and getting a Leupold Long Range scope with 30MM tube and extra elevation adjustment. Or something similar...
I have bought a couple Leupold LR scopes, a 3.5-10x40 M3, and a 6.5-20x50. Now I do not even like to use my cheaper "bargain" priced junk.
Premier Reticles is a company thatsells Leupold scopes with many options.
I have a Rem 700 VS LH also, with the 3.5-10x40 LR M3 I have shot many .3 inch 5-shot groups with handloaded Sierra 190gr HPBT Matchkings. Without any alterations or gunsmithing to the rifle.
Good Luck! Here is a link to Premier Reticles, they are worth checking out.