Can we discuss the reliability of M-1 Carbines?????

[bonnie]

I cannot cite the source for this information but have used it for many years:

A new USGI 15 round magazine should measure 1.5 inches from bottom of retaining lug to top rear of feed lip using a micrometer. I found this to be a good way to check a good magazine that has gone bad. Usually find the measurement is well under 1.5 inches indicating the magazine retaining lugs are too worn for reliable feeding.