Storing powder

[snakehunter]

I have found evidence of very light rust marks on the insides of some of my 1 pound IMR metal containers after I've used up the powder during reloading.

Me too

[Jim in Salt Lake]

I recommend immediately transferring that powder into brass and shooting it. Years ago, I got cans of powder from my Dad's workshop after he passed. It was all good and we shot it up instead of storing it. Some was 30 years old, it was all good. I figured it was better to use it right up and it had been stored long enough.