Oh that’s a problem. You should absolutely be able to drop a round in the chamber and it feed. It’s usually because the front of the follower isn’t up all the way. Is it a factory stock and bottom metal?
The Tikka 223 mags seemed to start having issues about two years ago. Not sure what happened, and it’s not all of them-but it’s happening often enough that I’ve seen it with quite a few. The 4 rounders are better than the 6 rounders overall. I still have 2-3 original mags from 2013 or so that feed perfectly, but about 30-50% of new mags seemed to need to be tweaked. A lot, or most issues seem to be with non factory stocks and bottom metal- quite a few of the guns/mags that i have seen give issues, worked fine when everything was put back to factory.