How to charge AC with propane?

[RANGER1]

i thought you charged to super heat on capilery systems and sub cooling on txv systems without a receiver

I would say both, so you know it’s not banking up in condenser.
Room would also be close to or in range of set point so stable conditions.
Propane to me same as R22 on P/T chart, just don’t need as much propane in system, as previously mentioned.