Shreq talks about creating DOPE charts for airsoft sniping to help ensure that first shot matters... "First-shot accuracy is everything in airsoft sniping. In this video, I break down how I use my scope to range targets and create DOPE charts so my first shot has the best chance of hitting. I’ll show two practical DOPE methods you can actually use in-game.
This isn’t theory or lab testing — this is how I do it on the field.

Marksmen always have DOPE Cards (Data on Previous Engagements) and if you an airsoft sniper or precision shooter you may want to make your own. A Dope Card is essential for predicting where a projectile will land at known distances with a specific rifle and ammunition combination. The acronym DOPE can stand for either "Data on Personal Equipment" or the more tactical "Data Observed from Previous Engagements," though there's no definitive agreement on its meaning. Ghost Ghillie shows how.