@Navin Johnson
Organic ballistic gel varies a LOT in penetration if not perfectly at 4 degrees Celsius (40 F).
Even at 50 degrees F the results are much different.
That’s not easy to control outdoors at a range.
Looks like the clear gel might be pretty good (far from meaningless or “not real”) even as it is, but might be even better if it were adjusted to pass the lower end of a calibration standard.
I’ll probably skip organic gel and just use an HST as an internal control. If ammo penetrates more then it might be too much. If less then maybe it’s too little.