When I first took on the endeavor to become a competent (and I’m still working on it) long range precision shooter I was told by Billy Butler to get a DOPE book. The first thing that popped into my head was, “I don’t do drugs” then after listening to him I quickly understood what he meant.
My first D.O.P.E. book was just a collection of paper notes, it seemed I was always writing on something different and stuffing them into my drag bag. Sometimes I would remember to bring a pen and paper, other times I would be using a receipt I pulled out of my wallet. Every once in awhile I would collect the notes and try and put them together. I never really gathered solid information in an organized manner so I could utilize it later. I wasted a bunch of .300 Win Mag. Mk 248 mod 0 rounds
by not carefully recording each round. I did get time behind the rifle and learned a lot through trial and error so it wasn’t a total loss.