Hello, I am struggling with understanding air temperatures effect on density altitude and it's effect on the flight of a bullet. I understand that as temp goes up air resistance/density goes down but in looking at a chart I have I can’t seem to make out a pattern in relation to temp. It appears that at some points on the chart a 10deg change in temp makes a 500’ shift in elevation one way but 10deg shift in the opposite direction can be 1000’ shift. How do altitude/barometric pressure relate with temp in overall air density? Is this shift I am seeing in the chart, is it related to how water vapor/humidity is acting in those temp/baro conditions? Thanks in advance for helping an ex-army grunt understand…..