By Croft Barker. Croft has done it again with an informative book on one of his favorite calibers. The 50-70's history and use in the military and western expansion. Included are chapters on twist rates, reloading equipment and fifty caliber bullets. Plenty of good information on reloading procedures, loads, bullets, hunting, shooting at competitions, tuning the rifle, twist rates and custom rifles. 6" x9", 122 pages softbound 20 + photos plus illustrations.