Getting to 1000, consistently, will take a good bit more than a $500 scope...tracking is the most important aspect of the game at that range. Of course, you need to start somewhere...1000 yards is a LONG ways out.
For the same $$ of the Viper, I'd opt for the Leopold Mark-AR Mod 1, 6-18X40. Get a new dial, cut to just plain Mils and get some trigger time in.
_________________________
“It isn't so much that liberals are ignorant. It's just that they know so many things that aren't so.”
- Ronald Reagan