Looking for a scope to take shots up out to 1000 yards but don't want to break the bank. I have a Vortex 1-4X24 Viper PST 30mm that I have on a .308 and it's good quality. The scope would be for a Ruger Precision 6.5 Creedmoor that I'm hoping to get over the next couple months. I'm not wanting to spend more than $600 and wondered what anyone would recommend. Thanks.