In a target shooting environment, if I figure out which hand load works best for my rifle at say 100 yards, then when I go out to 600 or 900 yards, do I need to work up a different load? I would still be supersonic out to about 1400 yards. Assume I am using the heaviest bullet I would want to use (in my case a Berger 6mm 105 grain VLD), with the a fairly high ballistic coefficient. I think I should be fine, but it got me thinking about wind effects and I wasn't sure if other loads might be better off. Testing that would be another matter. Has anyone tried this out?