so, no issues with loads of be-86, made a ladder from 4 to 5.2gr, by load data it 'seems' that it may be ok to go up to 6, but, well, will test what was made first, as i want them to remain subsonic from the 10.5" barrel. no issues with 5gr so far space wise, all fits fine. calculator suggest subsonic edge to be around 5gr load, will see how accurate it will be proven to be.
nasty seating ring remains, but the good thing - those 165gr bullets from capital cartridge seem to fit fine glock barrels and CZ barrels chambers with 0 issues, no matter what brass i use - as i got a mix of every possible stamps. it may be that extreme bullets only have that issue with sizing, what i got here does not seem to have any problems.
will test fire it all first, then may be will have to dremel the seating die a bit to try to reduce the ring.