At 2 different matches with different guys and different guns I saw that new Wally Federal consistently double feed in a gun that was working fine with Win White box the magazine before.
And another striker fired pistol that wouldn't ignite the primers although Win White box also worked fine.
Ahh, see here we go, after a bunch of searching around it seems that from what I've found that it's more likely that "Federal Champion" is really "Blazer Brass" (with cheaper, harder CCI primers) re-packedged into a new box rather than a "true" Federal offering (the theory is wallymart had them do this since when the ammo-shortege was in-effect last year LGS's were buying up all the Blazer Brass at $10 a box then putting it on their shelves and selling it at a mark-up).
ATK is the parent company of both so that's why I'm asking (seems the FC = BB theory/story might check out...), I've inquired with the company but have never gotten an answer...