I finally put a strain gage on the Green Mountain 357 Contender Barrel with the Eagle Arms stub.
I wasn't happy with the gage installation for a variety of reasons. I used a 6 year old tube of superglue, and it didn't seem very sticky to me. Superglue has a shelf life so you are supposed to use fresh glue, but this was all I had on hand at the time.
Then I unintentionally got superglue on the connector. I had to reseat the cable multiple times before it would make contact.
And then the way the cable was routed was not ideal. So all in all, I was not happy with this particular installation.
Then there is the question of whether the strain gage will even work correctly with a barrel stub. If the stub threads are a loose fit, that is bound to mess up the expansion of the stub when the cartridge is fired. But I strove for a tight fit on the threads, and used lots of anti-sieze with the hope that it would fill any gaps between the tenon threads and the stub threads.
Anyway, here is the result, with no tweaks to the data. The good news is that the average peak pressure is about 35,000 psi, about what a 357 mag should be. The bad news is that it is extremely noisy data to the point that it's not very usable.
I'm not sure whether the noise is due to the stub, or due to the not-so-great gage installation? We'll see if the noise problem shows up on the next stubbed barrel that I put together.