Impact Data Log-Books

Impact Data log BooksBy Danny Reever
Shooters’ notebooks (aka “data books” or “log books”) allow the shooter to record critical shot data and general information. To log data, I’ve seen everything used from simple note cards to huge ledger books and everything in between. I’ve tried many of the commercial logbook offerings as well as some of the military-type sniper data books. Invariably they lack some “mission critical” information pages, while being stuffed with pages that aren’t useful at all. One ends up discarding non-useful pages only to be left with a shortage of really functional pages.

Given the shortcomings of most commercial data books, I resorted to making my own logs using simple spiral notebooks. That was until I discovered Impact Data Books, created by Tony Gimmellie, a competitive shooter and USMC vet who served seven years as a Marine Scout Sniper. While in the military, Tony made his data books for himself and for other Marines because commercial offerings lacked important (and even essential) features.


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After Tony left the Marines in 2001 he set out to create modular data books with removable, replaceable pages. Some years later, Tony met Tom Challey who brought much-needed design and layout skills to the project. Starting in 2009, Tony and Tom began selling Impact Data Books. Customized Impact Data Books are now used by the U.S. military, federal and state law enforcement agencies, gun manufacturers, and by well-known shooting schools. Standardized, pre-made Impact Data Books are sold by MidwayUSA and other vendors. Two sizes are offered: the standard 9 1/8″ by 6.5″ book or a 5.5″ x 4 1/4″ pocket-sized version.

Impact Data log Books
TAB GEAR Cordura covers for large or small Impact Data Books are $42.00 from Riflesonly.com.

Review of Impact Data Books
The first thing that you will notice about an Impact Data Book is the durable Poly-carbonate three ring binder. The tough plastic covers have been scored so that the book lays open flat and won’t accidently close. Covers come in two colors: tan with the Impact Data Book logo in black, or black with logo in red. The standard page material is heavy, 80-weight executive stock, or, for a slight additional charge, you can get “Rite in the Rain” water-resistant stock.

Each Impact Data Book comes with a set of standard pages that include: wind observation, general ballistic tables, range estimation, size of objects reference, yards to meters conversion tables, common conversion formulas, leads for moving targets, angle fire information, mil-value adjustments, and MOA-adjustment values. You then can choose among eight (8) sets of ten double-sided pages to augment the basic reference pages.

Impact Data log Books

Impact Data Books offer many alternative page formats. Drawing from over 250 different page designs, you can optimize a modular book for your individual needs. If you shoot short range benchrest, 600- or 1000-yard benchrest, F-class, NRA Service rifle there are pages for you. Want blank pages, grids, circles, animal silhouettes, drills, special shapes, even Shoot-N-C targets? Impact Data Books offers those pages too. And if you still can’t find what you need, Tony and Tom can customize a page for you or your organization, optimized for your discipline(s).

The complete modular book will have 100 double-sided sheets providing the shooter with 160 data collection pages, 20 pages of reference material, plus 3 round-count pages, 3 note pages, 2 sniper range cards, and two field sketch pages. Over all, you’ll have 200 pages optimized for your needs. In the real world, that’s far more useful than any “off-the-shelf” data book filled with many pages you don’t need or want.

What Do They Cost?
A pre-made Impact Data Book, such as the F-Class book, costs $32.00. You’ll pay $42.00 for a fully-customized 200-page (100 sheets) modular data book. Additional page sets can be added for just $3.99 per set of ten double-sided pages.


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Danny’s Custom GroundHog Match Data Book
I shoot a lot of GroundHog/Varmint Matches. For these competitions, I wanted a book that would work at many different club matches yet adapt to each club’s particular yardages and course of fire. I worked with Tony to come up with a GroundHog Match book that contains: one set of index pages with wind charts etc.; 40 double-sided GroundHog Match sheets; one shooters info/rifle info page; 10 load development sheets; 10 round-count sheets; 10 blank end-of-fire data sheets; 5 note pages; and 5 come-up sheets.

Impact Data log Books

I think any shooter involved in groundhog shoots or fun varmint matches can benefit from this GroundHog Match Data book, priced at $32.00. You can order from me, we3reevers [at] embarqmail.com, or order directly from Impact Data Books, P.O. Box 223, King George, VA 22485.

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