There are many differing opinions on the Strengths of various actions from the 1870 through the 1920s mostly, it seems, without Real Factual Data to support their positions. J. Hatcher was an Officer involved with Springfield Armory and other Commands over his career and his 'NOTBOOK' is very interesting and informative reading. his discussions on the development of the Various Service Rifles, at least from "Krag" through the M1 Rifle, are detailed with information on troubles and failure analysis both proving some theories and Disproving others. He includes detail summaries of the Failed M1903 Early Receivers and the Analysis that resulted in improved Receivers, both for the M1903 and for subsequent Military Rifles and Carbines. Some of my past experiences are applicable to materials selection although it is not my major Career Area of Specialization, I am by training and education an Electronics Technician, and have worked as a Calibration technician and Associate Engineer, then as a Components Engineer before saying 'to H*** with this cycle of hire and layoff by the Project', and I joined the IBEW (Local 40) to work in the Movie Industry for the last few years. I was for a time a member of ASM, AWS, SAE, ARRA, AIAA, and some others. I am somewhat of a Machinist, as I can operate Lathes, Mills, and other Shop Tools from my Industrial Arts Classes in Junior College. I do know how to Gas Weld and Braze/Solder but do not Electric Weld as I don't like the Long term effects on Vision I have witnessed in Professional Welders of my Acquaintance. I know All Materials have Cyclic Loading Fatigue Limits that can result in Failures under load with little warning leading up to the Final point of failure. I also know that engineering, BEFORE the now ubiquitous Computer Aided Design Systems, left more 'margin of error' extra material in loaded items than our modern counterparts do. Pre 1960 automobiles are still reparable. Best Regards, Chev. William
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