My Blue bolt female mated with a 2 bar BKK male....offspring were mostly 1 and 2 bar BKKs, a panda Bkk, and 2 wine red pandas!
So yes they will cross, but you will get a mix of different patterns and colors. If you just want Blue bolts, then keep them separate and only breed BB x BB.
However, as I suspect the origin of a BB is Snow white Crystal shrimp x BKK, and the offspring came out blue tinged, and then it was recrossed possibly several times to enhance the blue color....you may also end up
with a BKK from the BB x BB cross (because you don't know what's in the background genetics) Just my theory.