I've been struggling with POI shifts on my Discovery/Katana. I think I'm getting there, definitely had to rework the transfer port to get the breech down in front. I'd love to have a repeater with a shroud at the low fill pressure that the Discovery uses. So, what kind of accuracy do you BNM breech users get and how do you like the setup?
Get the rear bolt!!! First I got the side bolt and would have loved the ergonomics but that was the most difficult thing to cock ever! Had to get just the right leverage for the thing to budge. Luckily Sergio let me exchange it for the rear bolt. Now that one is buttery smooth!
I have a TKO ldc on mine but I've heard the bnm shroud is similarly quiet...