So I'm going to be getting a 6.5 creedmoor (probably a Tikka CTR) and I was wondering how elevation will affect my shooting. I do antelope hunting and will probably participate in some PRS matches around 6300 feet and go for deer around 8000 feet. Will there be a noticeable difference between these two as well? I will probably be getting the 20" barrel since my Spewar 762 should be home soon.