I was gifted a container of H4831.
The powder was stored in the original 50# round cardboard container. There is 25#-30# of it left.
The lid had lost it`s seal and the powder has been exposed to open air for some time.
It has been stored in an enclosed outbuilding.
It had been kept dry except what moisture it drew from the air.
It is completely dry now.
It appears completely normal with no apparent physical or chemical changes.
There is no sign of clumping or red dust.
The kernels appear normal.
I ran my hand through it and I could still get that slight solvent smell you get when you open a fresh can of powder.
That`s a lot of powder to toss.
I think I am going to try some starting loads.
I have fresh H4831 that I can load the same loads to compare velocities.