I actually emailed and called a few places to check on safe operation with a LRB and removable chokes in my .12 gauge Pedersoli. The answer always seemed to lean towards ensuring concentric chokes, and only using cylinder bore chokes of high quality, so I bought two stainless cylinder bore chokes. I’ve experimented with my loads and found that my buckshot shoots well with cylinder bore chokes based on how I build the charge. There are many good threads on here about building loads and steps to pattern your shotgun. That’s the fun part; get out there and experiment. I’ve ended up with 80 grains of FFG with a fiber/shock wad cut into thirds that’s been soaked/lubed in olive oil. I add the 00 buck and cover with two overshot cards/wads. I ended up using a patched .690” ball out of caution, but man it worked well. It seems to work well in mine. Again, there are many smarter than I on here; there are some great threads on the topic. Just be safe. I’ve used a similar load with a #7/8 shot mix for squirrel that worked well with a modified choke in my shotgun. I’m still working on a load for duck and geese. I’m learning too.