Many years ago I bought a brand new box of Win .270 Silvertips. Out of that box, 2 rounds didn't fire even with repeated strikes. I still have that rifle & it has fired 1,000's of rounds since (mostly handloads) & it has never failed. I wish I had sent that box back to Winchester, but instead I never bought Winchester CF factory ammo again.
Just glad I wasn't pulling the trigger on a buck of a lifetime!