I bet it's just fine. I'm still shooting some WWII-surplus 4831 that hasn't lost any oomph, based on my chrono readings. The only caveat is that your powder was stored in uncontrolled conditions where the summer temps can get pretty hot.
Use your eyes and nose to check for deterioration....just google what signs to look for.
"For every complex problem there is an answer that is clear, simple.....and wrong." H. L. Mencken