I pumped to pop two Q24s that were already inflated several times before, they got huge and the pop was very loud. Definately my biggest P2P.
I also pumped to pop some Belbal 14"s, mostly crystal colors and they were also very loud.
Can't say if the Q24s or the Belbal 14"s were louder.
I also managed some few B2Ps wit Belbal 14"s and these were my biggest und loudest B2Ps.
But B2Ps are still very, very difficult for me...