Into the early 90s at least, although they’d been made inoperative by having the firing pins cut off by then. It was funny - we were doing SLR drill with 303s when the NZ Army was using Steyrs.
Reading this last update is like seeing the black clouds of the thunderstorm that's been forecast start to roll across the sky, and you're just quickly making sure you've got everything undercover, secured, and all the windows properly shut.
Have read through this fascinating timeline and waiting for more with anticipation.
Also, query for the author:
Do you have a set finish date and general plan of how this timeline will run?
I looked this up on a map, and one interesting result could be butterflying the Lonnie Zamora incident incident in 1964, Socorro being south of the explosion and well inside the fallout zone, if the wind is blowing a certain way
https://en.wikipedia.org/wiki/Lonnie_Zamora_incident