I found two 100 round boxes at Walmart last week. Remington brand. I bought one box, and left the other for someone else as I have plenty of Federal bricks.
Unfortunately, the Federal is not what I call good quality. power charges seem to vary and sometimes I get a misfire when the primer in the rim fails to ignite.
So I use Remington or WINCHESTER when I can find them.
I find the Remington to be iffy and the Federal to be reliable