Might want to check your OAL.
Sounds like your bullet may be jamming into the rifling / chamber.

I have a Glock and a CZ that have 'short chambers' and with some different bullet shapes / ogives the bullet will jam into the rifling.
I usually don't have any problems with RN bullets. But have had problems with Truncated Cone Flat Nose bullets.

Might want to do a 'plunk test ' on your bullets. Take the barrel out of the firearm and drop a round in the chamber to see if it goes flush into the chamber.