I was able to perform a similar test a few years ago when CorBon sent a rep with a huge batch of gel to the training facility where I worked. I fired several dozen different loads that day from .32-.460 s&w.
Quite a few different duty .38 loads were shot. I switched to the CorBon DPX 110gr load THAT DAY after seeing the stellar performance of that load and the SURPRISINGLY POOR performance of everything else.
