I have just purchased a Remington sendero in 300 rum. Now I am looking at purchasing a scope for this rifle. gun will mostly be used for hunting whitetails out to 600 yards maybe a little farther depending how good i am able to shoot the gun. Also, hoping to use gun on an elk hunt someday. I am looking at a price range of $1000. Am leaning toward a Zeiss conquest 4.5-14x50 w/z800 reticle. but don't know if that is a large enough power to judge a deer accurately at that distance. Do i need to up grade to a 6.5-20. not set on power or band any suggestions greatly appreciated.