Ditto to what the others have told you...What brand of primer are u using?

I have had some winchester primers that seemed to set too easy as well,
but the cases were brand new.....Then I have had CCI'S that setted really hard in the same cases..
I wouldn't toss them yet...Try other brands of primers first.Brass it too pricey
to just throw away....I save all my old brass and sell it..Get cash for more powder or
what ever...Good luck