I dunno, that to me looks like you are only partially resizing the neck of the case. Which would imply the resizing die was not adjusted down enough.
You say you can seat a bullet and it chambers?
I have crushed shoulders before with a die adjusted too low, but the bulge in that case was at the junction o the shoulder and the main diameter of the case, not the neck - and they would not chamber.
Some shooters only partially neck size brass if they are only reloading for one rifle believing its a more accurate reload.