Only testing that was done by the USA that I am aware of was the SEVERAL trials of the Luger in the early 1900's
I would imagine that independent testing has been done - even in Guns and Ammo I don't ever remember anyone wanting to do a destroy test. You tube shows none on a Luger (mud test though
https://www.youtube.com/watch?v=z_IeAaR5AmU )
Don, you are talking about a design older than yourself, so comparing newer testing to it is a bit much? I mean, Thompson's testing of the assorted calibers was done on live cows, would that be allowed today? And cadavers if I remember right....
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Alvin, you were using a loading tool?
I have experience, I would say, almost vast experience loading thousands of rounds into 45 magazines, Beretta magazines and the M16 - multiple times at ranges, sometimes twice a year, without a loading tool. So, I do know how that feels...
A reblued ''shooter'' luger, any year you can pick up for less than $900 - much less if you are determined, which is cheaper than an Interarms

But what is more expensive, even if reloading is to fire 5 thousand rounds through a minimum of two lugers in nice shape. Which would be needed for an accurate testing of reliability?