Type 2 NM WRA!

[Cosine26]

Rhetorical Question
I have a rhetorical question for the M1 Experts. The question concerns a “Winchester Type 2 National Match M1”
I am not a collector but my definition of a National Match rifle (be it a M1903, an M1 or an M14) is a match rifle built at the Springfield Armory by SA technicians to the specification in effect at the time the rifle was built. All others while they may be MATCH rifles are not National Match. This is not to impugn the accuracy of rifles built by armorers other than SA. I have a Match M1 built by an army armorer on a Winchester receiver using all NM parts that will shoot with any NM M1, but it is not a National Match by my definition.
It is my understanding that the first 800 NM M1’s were rifles taken from the assembly line at SA which when targeted showed exceptional accuracy. These were reworked and issued as NM M1’s. In subsequent years NM M1’s were either new M1’s taken from the SA production line or rebuilt M1’s from previous years which were turned in by service teams until 1960. After 1960 the M1 was no longer in production so that all 1960 and later NM M1’s were rebuilds. It would seem to me that all true NM M1’s (according to my definition above) would have SA receivers.
For many years from 1959 through 1969, the heyday of the M1 as a NM rifle, I lived within 20 miles of two Army posts, shot with and against the post teams, and knew the post rifle team members and armorers very well. Each year these teams when traveling to the National Matches at Camp Perry would turn in last year’s rifles and draw a new issue of the current NM M1’s. The “turn ins” would be rebuilt for reissue next year. I suppose that some of the receivers would be found to be “unserviceable” and would be replaced with receivers drawn from stock. I suppose that it is possible that at this time a receiver manufactured by a manufacturer other the SA could be introduced into the system but I should think that the SA would maintain a stock of receivers for replacement purposes. I would wonder if the artisans as SA would consider a Winchester receiver with its rough machining would be considered adequate for use in building a NM M1?
Just a rhetorical question for the experts.