The other ten were made before 1917, two in 1904. Only one of the 11 receivers that failed in 1917 was made in that year. The belief that the problem with brittle receivers was caused by inexperienced workers overheating the receivers in 1917 is not supported by the data. Of the 15 years between 1903 and the end of 1917 when the heat treatment method was changed, there were no failures in five of the years (1908-10, 1912, 1915). The overall failure rate of the 33 Springfield receivers was 4.13 failures per 100,000 receivers. ![]() The site is a great resource for the M 1903 and 03A3 shooter/collector
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