Sightmark sniper data book w/cover - SightMark Sniper Data Book w/Cover

I use a round count book by (Impact Data Books) for all of my long guns. I used the targets for two of my long range specialty rifles. I would write the date and all of the days data on these targets. While this does work, it is rather combersome to both store and review data. This year I have been pursuing in more depth the art of long range shooting. I’ve read books especially (Ryan Cleckner’s) and working with more experienced shooters. An instructor suggested that I keep a data book and used the SightMark book as an example. I now use these books on the two specialty rifles and will add books as I add rifles. First of all the cover is very well made of quality materials. It is zippered with a pocket to hold the book (much like the daytimer series products), it has three pen/pencil slots, a calculator slot, two upper slots, and a large back slot. I use one upper for the round count book and one for my gun specific Mildot Master. I keep the book for the Mildot Master in the large back slot. Even with all of this the book is sized to be very handy at the range and anywhere else it may be needed. This data book includes formulas, incline/decline, wind deflection, coriolis effect, target leads, range charts, crosswind weighting factor, wind charts, optic setup, cold bore data, target data sheets, target lead data sheets, field sketches, chronograph data sheets, reload data sheets and barrel logs. It would be nice if the spiral binder could have been made to easily add or subtract individual sheets. I would personally like to have target data sheets with round targets in addition to the ones with the torso targets. The crosswind weighting factor took awhile and is still a little harder to understand (but that is just me). All in all this system has helped me tremendously. I highly recommend it. Thanks to all of the folks at SightMark. To anyone reading this long winded review, I hope this has helped and wish you the best.