How many rounds do you have through it? It may still be breaking in.
However, take a picture of the LRBHO and a manual pull to open the bolt. It sounds like it may not going back quite as far when shooting the last round for some reason.
Hell, I hung out with the riff raff at school as well. I grew up as riff raff and always will be. I just needed a job that would let me afford the toys I wanted.
@COBrien he is right though. You should run before the other JDs find out who you are hanging out with.
This is what I usually have in my Governor, although not at that price.
https://exammo-com.3dcartstores.com/Hornady-Critical-Defense-410-Bore-1-Slug-2-RD-Ball-FTX-Centerfire-Shotgun-Slug-Ammunition-Box-of-20_p_331.html
The only thing that will get you is a functional rifle to start and more money for ammo and/or money for the next project. I say that is the best way to do things.
I've never had an issue with my Rock River LAR8 with any ammo including milsurp 762. Like suggested, lube it and shoot what it likes before going back to the other.
All that porn you look at have you a virus.
Seriously, hope you get better soon. If you have a bad headache, lose sense of smell or taste, stay away from your wife. I know she doesn't need any more misery. Get well soon and hope it's just a cold.
Looking at the man who has the science figured out on AR buffer systems heavybuffers.com, it may be that your spring is too short. Rifle length buffers need a spring that is 13.75 inches with 34 coils.