About to start casting (after a 25year break from casting pistol bullets) for my 500NE. I'll be using a beeswax/vaseline lube and have noticed that the ratio people use seems to vary between 60:40 to 75:25. How do people arrive at the best mix for them? Our summers here get relatively warm (low to mid 30s) so I thought a 75:25 mix would give a more "stable" mixture.