In the old days I used fired 209 primers to swage Remington hulls with *57 size primer pockets. Prime with the fired primer, de-prime and then prime with a live 209 primer. It worked fine.

Are you sure they are Federals with *57 primer pockets. In my 43 years of reloading the only hulls I've personally seen with *57 primer pockets are Remington and Alcan. Of course, when it comes to reloading, nothing is set in stone and there may be Federals with *57 primer pockets.