«Chapter 3 – Effects of Altitude and Atmospheric Conditions» http://www.exteriorballistics.com/ebexplained/5th/31.cfm Effects of Altitude and Atmospheric Pressure Rifle and Handgun Reloading Manual, 5th Edition Exterior Ballistics Exterior Ballistics Exterior Ballistics Rifle and Handgun Reloading Manual, 5th Edition Exterior Ballistics http://www.exteriorballistics.com/eb...ned/5th/31.cfm Exterior Ballistics