Shelf Life for Powder/Primers

[Big joe]

Gentlemen,

I have several pounds of various powders and several hundred primers that are 10-15 years old. Should I be concerned about using these for any reason? In the past I'd have just bought some new however, I stopped by Sportsmans Warehouse and MAN! Powder and primers are GONE!!! I sure hope I can use what I have.

Please let me know, if you know, if these are OK to use.

Thanks,