Guys, I started to load some 308 shells yesterday and didn't have but a little powder left in my can of IMR3031. After scrounging around I found a full & unopened can that my dad bought almost 15 years ago. I went ahead and loaded the shells with it. 45grs of IMR3031 behind a 130 gr hornady bullet. This load shoots VERY well out of my Rem 788. The question I'm asking is this...Is this powder ok? It didn't have any bad smells or discolorations and the can was still sealed tight. I started thinking about this today and figured I'd ask for an opinion before shooting any of these. I know that burn rates and pressures could be different than the last(newer)can and I don't want to harm myself or the gun.