I was going to remove the above post as I see you were talking about the centre fires. I decided to leave it as I'm trying to show you may need to experiment with different loads for regulation.

That noted, 110gr. shot perfectly in my .58, however an increase to 120gr. had the barrels crossing again, with the left shooting high now and right shooting low.

When starting out, 82gr. 2F had them crossing, but left shooting low and right shooting high.