Urutau loading sideways

Hi everyone, I’ve hit a snag with the feeding mechanism on my recent build. About 70% of the time, the tip of the cartridge enters the barrel, but the rest of the cartridge ends up sitting at an angle/sideways.

I’ve already addressed some burrs in the 2.1mm hole and smoothed out the feed ramp , but the alignment issue is still there.

i made a slow-mo video and it seems that the end of the cartridge gets pushed upwards, what can be causing this?