Thread: Help with D.O.P.E card

In principle you can do it like this:
Sight in so your shots are hitting exactly on the aiming point at 100m.
Test your sight adjustments by dialling up 20moa and shooting a 5 shot group. This will tell you if your clicks are properly moa based or a little out. If there is some horizontal movement too its likely your scope or hold arent vertical. In practice its hard to be sure of something like a 1 moa difference unless youre a past master bench rest shooter.
Then put an approximate muzzle velocity and the best estimate of BCyou can get into a ballistic app. Double check all other inputs like scope height, atmosphere temp etx are the correct units and values. Use that to get a preliminary come up value to hit the target at about 600m measure ghe range very exactly by careful use of rangefinder because its critical.
Fire a 5 shot group at 600m and then adjust the amount you need to hit dead centre. Use a big piece of paper. Very big. Fire as many 5 shot groups asyou need, to establishthe group well centred for elevation. Dont worry about horizontal at 600m because wind will move it. You e established your windage zero at 100m.
Then go back to your ballistic app and adjust the mv input till it predicts the actual elevation come up you needed. That is your working muzzle velocity. Many apps have this as a function built in feature and is called “truing”.
Then you can use the app to estimate required come up adjustment for any other range. And if you feel clever you can use the predicted trajectory to sight in At any other distance and set your 100m zero again.