Quote Originally Posted by m1903rifle View Post
The receivers were numbered BEFORE they were heat treated. Are you saying that the few thousand receivers were numbered above 800,000 and then only given a Single Heat Treatment?
However or why ever it was done, there were several thousand casehardened receivers that made it onto rifles that had serial numbers above 800000. These were completed rifles and the receivers were never double heat treated.

---------- Post added at 02:04 PM ---------- Previous post was at 02:01 PM ----------

Quote Originally Posted by m1903rifle View Post
The receivers were numbered BEFORE they were heat treated. Are you saying that the few thousand receivers were numbered above 800,000 and then only given a Single Heat Treatment?
However or why ever it was done, there were several thousand casehardened receivers that made it onto rifles that had serial numbers above 800000. These were completed rifles and the receivers were never double heat treated.

There were about 5,000 RIA 1903's that had double heat treated receivers whose serial numbers are in the single heat treat range of that Arsenal.