I have a few containers of titegroup. Been sitting on the work bench for more than a decade. Still good?

I have powder that is over 50 years old that I'm still shooting. I have surplus ammo that is 80 years old that still shoots.

Provided the powder is stored in a coolish place out of direct sunlight, it will last a long time. If you open it up and it smells funny, or has a brownish/orange color, then you should throw it out. If it looks good, just use it. I'm still using powder that was sold in cardboard kegs.

Yep. Stored correctly, it will last a LONG time. I have some 20-25 years old powders that work perfectly. I had purchased a bunch of powder when I was big into trap shooting and pheasant hunting. But I moved and dropped out of those sports. So it sat for years before I got more into handgun reloading. So now I'm working my way through the powders as I'm shooting a lot of 9mm every week. No issues with it at all.

So long as the container was sealed, there should be no issues for that period of time at temperatures a human being can stand.

Oh yeah, I have a 4# of RedDot, probably from 1993? Still shoots fine. It's all about how you store your primers & powder; cool & dry.

Modern powders have stabilizers in them to help reduce the effects of heat and oxygen. Just don't go to extremes with your storage. :-)

I put a small amount on a white sheet of paper to see if it has yellowed or browned. Still using a canister from 95.

I have several pounds of 2400, Unique, 3031 and others. Most from the mid 70's. I use some of it from time to time with no issues.

An interesting discussion on powder longevity here:
https://thefiringline.com/foru...thread.php?p=5860901
Note the chart on the effects of temperature.

I had some green dot in the original metal container which I loaded and shot a while back, the only difference that I noticed was the sound, it didn't have that big bang like the new can did. But I got it from my father and who knows how he stored it back in the day.

I'm feeling bad. My Bullseye supply is in a cardboard barrel. Best I can figure, maybe early 1970s. I've got #s of newer, but why toss out my antique powder?

As for how long it lasts, everyone says what are the storage conditions. All the stuff stored in brass cylinders with lead stoppers still works fine.

I spent my youth shooting German 8mm ammo that was really cheap. The shop owners all knew us on sight. One in a near city just gave us all he had left. Said we were the only customers that even showed interest in it. Again, stored in brass containers with copper plated stoppers. Those had date stamps on the base. WWI or WWII I wonder if those dirty ole germans knew something we didn't?

I have cans of WW231, Unique and various IMRs that are thirty plus years old and loaded ammunition older than my self which is 78 years. It all works great.

I am still loading H4831 surplus powder from WWII. I've got a lot of money in it at fifty cents a pound delivered. Ah the good old days! It's probably 75 or more years old.