Weatherby rifles incorporated a “ free jump” throat before the rifeling.
Barnes copper bullets recommend right or near the rifling.
The weirdest deal I have had is the 6.5 x 55 husqavarna bolt actions in model 98.
The earlier made one ( a rifle with a steel floor plate) got “ sticky “ on extraction mid book. I thought that interesting as the “book” loads were for the weaker model 96. Swede action
The other one ( a carbine) kept going past book. I don’t remember it’s floor plate but I think it was the later aluminum plate. It kept on keeping on. I finally just called it good