Old primed brass and powder

[North of 60]

My Dad started reloading in the late 1940's. I remember I helped him (sort of) when I was young. I have a 1903 Springfield that been sporterized. I reload for it and it likes military surplus #4895. Dad and some of his friends that reloaded bought some surplus military 4895 thru the NRA back in the 1950's and I had all I wanted for my 03. I ran out of mine about 10 years ago. When Dad passed and I was cleaning out his reloading room, BINGO ! I found about 5# of it, and it shoots fine and it was made during WWll 80 years ago.
So smokeless powder will last.

That's awesome and i bet your dad would be proud ...and be careful as not all smokeless powder will last a long time, especially in humid environments.

There are some chemistry reasons for why some powders last longer and some don't...and i haven't looked up exactly what the common reasons are for that.