Already in operational use. Mil-Spec materials and construction. Printed 20 lb. bond, tactical green "Rite-in-the-Rain" paper. Cover made of polydura plastic with black plastic spiral ring. 128 leaves, 256 pages of data book. Double the size of most competitors' books. 14 pages of formulas, conversion tables, and charts on range estimation, wind, moving targets, and angle fire. Data sheets for zero summaries, cold bore shots, zeroes, bullseye, stationary, unknown distance, and moving targets. Various mission sheets and a barrel log included. For 7.62 mm NATO/.308 and .300 Win. rifles.