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Chambering Rifles for Accuracy


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About the Author

Fred Zeglin has been building custom rifles for over 30 years and specializes in wildcat designs for his clients. He is currently the Firearms Technology Coordinator and the NRA Short Term Gunsmithing Program Coordinator for Flathead Community College in Kalispell, MT. He owns 4D Reamer Rentals Ltd. so he deals with more reamers and headspace gauges than any other gunsmith you will ever meet. Andy Hill at Hawk Bullets, had this to say about Fred, "During the normal course of business we have gotten to know some gunsmiths with superb skills, artists crafting metal and wood into fine and functional firearms. Usually their ballistic knowledge is well rounded, but we believe one such gunsmith is quickly becoming a modern day P.O. Ackley. He is Fred Zeglin and he has done extensive development of a line of wildcat cartridges gaining popularity for their ballistic properties and low felt recoil." Fine praise from a craftsman of quality bullets. Fred has taught NRA Gunsmithing courses in Wildcat Cartridge Design at Murray State College in Oklahoma, Flathead Valley Community College in Montana and Trinidad State Junior College in Colorado. He also worked with American Gunsmithing Institute (AGI) to create a Wildcat Cartridge lesson and Reloading instruction on DVD. Fred also writes a gunsmithing blog, that can be found at: https: // This book is part of a series of gunsmith manuals that Fred is writing. Titles include: Understanding Headspace, Chambering for Ackley Cartridges, Relining Barrels, Glass Bedding Rifles for Stability and Accuracy, and Chambering Rifle Barrels for Accuracy. Look for other books in the: "Gunsmithing Student Handbook Series". Gordy Gritters is a professional gunsmith who has been gunsmithing since 1987. His business was in Pella, Iowa from 1987 until he moved his shop to Kansas City, MO in 2011. He has done a lot of general gunsmithing, repairs, refinishing, and rebluing over the years, but his primary focus all these years has been on accurizing factory rifles and building extremely accurate custom rifles. Gordy has built rifles that have set many club, state, national, and world records, and that have won numerous State, Regional and National Championships in a number of disciplines, including 1000 Yard Benchrest and F-Class competition. Gordy helped Grizzly Industrial design their line of Gunsmith's Lathes, which are designed for chambering high-accuracy rifle barrels. He then worked with Grizzly to produce an instructional 116 DVD called "Chambering a Championship Match Barrel" to show how to use his chambering techniques. Gordy has helped many people over the years with all aspects of their gunsmith training, questions, or problems since then. He has been instrumental in helping a lot of new gunsmiths around the world set up shop and start their own businesses. Gordy now teaches precision rifle-building and accurizing classes several times a year in his shop in Kansas City, as well as being available for teaching private classes at other shops around the country. All his classes and instructional DVD's are geared toward both do-it-yourselfers and professional gunsmiths. He is in the process of developing the "Extreme Accuracy Series" of instructional precision gunsmithing DVD's to help others learn the fine art of building and accurizing rifles. These DVD's are available through his website, as well as through other vendors in the US and Canada. Website: Speedy Gonzales, a world class benchrest shooter in the Benchrest Hall of Fame, and is the proprietor of S.G. & Y. Precision Rifles, LLC. Speed is a top notch benchrest gunmaker, he is an instructor & all around gentleman. Speedy has won championships in both Varmint and Hunter Class competitions. He has 33 years of tool and die making experience in the plastic injection molding industry, of which he has drawn from to build some of the most accurate firearms and shooting accessories in the world.


Great book. I really like that the authors run through different ways to do the same task and the trade-offs involved. They go into some detail on key things like solid vs floating bushing style reamers, the potential importance of reasonably tight bolt fit (and its affect on lug-lapping), and pre-boring the chamber for ideal alingnment. The book covers bore lapping and chambering between centers vs through the headstock. This book explains all these potentially complex ideas in a clear, concise way. Lots of great detail. Gordy's explanation of why he uses the range rod method vs the long indicator method and the specifics of how he dials in chamber end vs muzzle end are very good. Assumes some knowledge of machining. S. Labbs

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