BH's website says the powder is not sensitive to temperature or humidity. I plan to use it once I burn up my Pyrodex.

I'll bet you could simply switch to Pyrodex in the LRH and be pretty close to where you are now. I've had my jug of Pyrodex now for several years, it has been opened over a year now. I do put the cover on tightly, with a piece of platic wrap under it.

Glad you recovered that deer.