All but one of mine were factory sealed as well. And if opened and used promptly they seemed pretty good. But I found that it went bad MUCH faster than anything new will do from exposure. Being Bullseye and using it for hand gun reloading each can lasted a long time over many sessions.
Bottom line? Use it for practice ammo and keep a brass range rod and something to use the rod for knocking bullets out of your bores. There is a good chance that it won't be superb.
The oddball thing is that there was no rhyme or reason to which would ignite just fine and which would not. The rounds were all from the same can but I'd still get roughly 1 in 50 squibs where, as I found out in two cases, the powder simply did not ignite from the flash of the primer. It was very odd.
I finished up the last 100 or so as slow fire practice rounds. Had two or three squibs in that last batch. But as it was just for slow fire practice it wasn't a big deal to sigh and get the rod and hunk of steel bar out again.
The other oddball thing is that the ones which did fire were fine. It wasn't like there was a big difference in muzzle velocity or anything. It was either good or it just didn't light off.
If this is putting you off I wouldn't blame you if you fertilize the garden with the Unique as well. The opened but nearly full can of Unique I still have. I've used it for fire forming rifle casings for my single shot rifle. It went BANG! consistently. So it's possible that Unique isn't as sensitive to age as Bullseye.
Dave, I don't know if you are aware of it or not, but Norma 205 is not one of their oldest powders.
The first Norma GunBug Guide, the one I used to start reloading, did not have Norma 205. 204 was their slowest powder.
After I had been loading for a year or two, using Norma components almost exclusively, Norma introduced their 205, with great fanfare, but it sure lived up to the hype.
Another strange thing is we have always been told that Norma introduced their replacement for 205, what did they call it, NMP, or some such designation, because 205 was unstable with temperature changes. Within the last few weeks I was reading an article in an old book about tests being done to find temperature change with various powders and it stated that Norma 205 actually showed a sleight increase in velocity, as temperatures lowered to the 30 below area!
Bruce
I used up the last of some H4831 that was at least 50 years old.
Also cleaned up some old Norma 205 that I had about ½ tin of.
These worked exactly as they did all through the years.
While I have had some powders deteriorate, this is rather rare...stored properly, they tend to keep well.
Regards, Dave.



























