I did and I am glad I never went with one. I got to use a friends and seeing that little dot was really hard.
if I am using say my 308 its no problem use the range finder to get the distance and I know the drops by heart for my gun from 100 yrds to 1000yrds.
If I am using another gun and a new load, I will stick the chrono on get the speed and use JBM then I will pint out a drop and windage chart. Normally I will pick 300-400 yrds as the maximum range and use 20 yrd intervals. I use the Inspect element in firefox to delete information in the table that is not needed. I just want the Bullet type weight and speed and the drop table stick it in my back pocket good to go. I should make a little plastic holder that would fir the but to carry the dope sheet.