In 2011 I will be heading out west for a long range Cow elk hunt. I will be doing a archery bull hunt in ID on way back stopping in CO to pop a cow. My question is how do I prepair for the ALT/Angle shots? I live in Low IN 800 something is my elevation. How do I prepair a drop chart for 6000+ ALT? Do I just trust my ballistic calculator? On that note I am using Ballistic FTE on my iphone for now.