Pretty much what I expected. I am not a nit-picking collector, but at least I can tell the difference between a square thread and 60* thread. What the hell does not knowing about serial number designations have to do with cutting threads? One of you collectors should be able to establish just where the 1 million thread switch information came from. I totally suspect it is an accepted rumor like the "Made the receiver longer for the .308 based cartridges".
Some one on here welded a bolt to install a barrel that was already threaded. If I remember correctly, it was a 22-250. I am kind of curious if that was a factory square thread barrel and how new it was.
I did look up the prefix "A" on a serial number. Apparently it has nothing to do with quantity produced.
There you have it. I posted two serial number ranges way under a million that I am absolutely sure of. I have done others with 60* threads and am not sure on the serial numbers, but I am sure none had a tang safety.
Last edited by Gunplummer; 07/23/15.
