I'm a big fan of your testing.
Personally, I'd love to see the .38 +p Underwood 125gr Gold Dot tested.
This one seems to be in the potential 'goldilocks zone' between .38 and .357, achieving ~950fps-1000fps from a 2" LCR/J frame. Basically like a rimmed 9mm velocity wise.
Some reputable testing of that load would be very welcome.
https://www.underwoodammo.com/38-spe...low-point.html
The XTP version would also be equally interesting and is in stock:
https://www.midwayusa.com/product/1020443027