12" monster barrel and bolt

[A5BLASTER]

I need help I put together a 12" monster barreled grendel and it was getting hung up at first so I lubed and shot it to loosen it up and still having feeding issues with only steel case ammo. So I bought a toolcraft bolt as a spare and it won't even seat unless I push it in super hard. So I took it apart and noticed burrs on the bolt and bult lugs. I'm trying to figure out how to post pictures

Ok so you built it up and were having feeding issues with steel case when useing the group buy bolt?

Then tryed a toolcraft bolt and it's worse?