Perhaps the Boy Scout motto applies?

Consider playing with JBM *before* you go to the range. Adjust for temperature/elevation at your local range and then adjust to alpine deer/elk at 5,000 feet elevation and 20F to see what's what. Also, try a 100 yard zero and compare to a 250 yard zero. Unless you are shooting a round that has the trajectory of a mortar, use a 250 yard zero set for your local range. BC and MV data are available from most manufacturers on their web site. The program will give you how many inches you'll need to be high at your 100 yard outdoor range. Likely 2-3 inches high at 100 and the same amount low at 300. Now you can confidently take a poke at shoulder/lungs with POA = POI from 0 - 300 paces without adjusting for drop.....