I did not see this recipe so I am posting it. I have had good luck with this lube in pistols but have only used it in cooler temps so I do not know if it would get too sticky in the hot weather.
Beeswax Moly-Graphite Lube
Equal parts of:
Sta-Lube Extreme Pressure Moly-Graph General Purpose Grease
Pure Beeswax
For a harder lube you can use 40% grease / 60% beeswax which should be fine in very hot temps. Apparently this has been used by some people with good success as well.
At one point when I was living in Nome, AK I couldn't find the Sta-Lube grease and used some other Moly Graphite grease and it worked fine.
Greebe