I bought 3 boxes of Federal 7x57mm Mauser 175Gr Classic Hi-Shok soft point factory loads in 1996 (new imports, so the ammunition was supposed to be fresh).
I tried them out and found out that 18 cartridges out of a 20 round box were prone to misfiring. Other purchasers of these Federal cartridges were also complaining of frequent misfires and hang fires.
I still kept two of the faulty boxes of cartridges as a souvenir (and someday, I might decide to pull the bullets & brass and reload them with new powders and primers).
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By contrast, I still have a few loose rounds of the old Winchester Super X 175Gr soft nosed factory load for the 7x57mm Mauser (which got discontinued in 1999). Not only have they never misfired, but their chronographed velocity is still pretty damned close to the advertised velocity of 2450 fps.
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Now, I don't mean to burn Federal at the stake. Absolutely not. I've successfully shot most of my African Cape buffalo with Federal Premium Trophy Bonded Bear Claw soft point factory loads in .375 Holland & Holland Magnum. And I'm absolutely in love with this cartridge.
But Federal does sometimes leave a lot to be desired with some of their products.