I live in NE Florida on a saltwater marsh. Low humidity is rarer than 2" of snow and/or hen's teeth. I am looking at clear, post frontal, blue bird skies today and the humidity is a low 60% for me.
All that whining over, I have concerns over humidity messing up my leftover powders. I do expect I will need to prewarm bullets before shake n bake and will keep the powder in airtight containers, but wonder if the opening and closing while extracting powder for use could result in dampness contamination. Would it be advisable to immediately breakup a pound of powder into multiple smaller containers to mitigate moisture absorption, or is moisture in the powder even a concern? Or am I over thinking again?