It varies from lot to lot. Most lots are just fine, occasionally there is a bad one. Happens to all the bulk ammo regardless of brand. Even CCI have had some bad lots before. I've been lucky and have only come across a bad lot of ammo once. It was some Federal American Eagle 2-3 years ago (pre shortages) that had around a 5% FTF rate through two bricks (about 50rnds out of the 1000). I had shot a few bricks (different lots) of the same ammo before with less than 1% FTF. Any bulk US brick (Rem, Win, or Fed) I expect around a 1% FTF rate; about 5 rounds per brick. With CCI it's usually closer to 1 in 1000 and with European brands (SK, Eley, RWS, Norma, etc.) I'm at a few thousand rounds fired with no FTF's.
This is my personal experience based on a few tens of thousands of rounds of 22lr fired in the past few years. It isn't concrete.