what would happen when bead form necklace of fireballs would be loaded into a firearm as an ammunition? Would loading count as ,,throwing" the bead and as soon as bead stopped in the barrel it would explode? If not, then should the bead have to roll reflex save to avoid detonation, and what should be DC ? and if it would be propelled, should it detonate on impact without dealing normal firearm damage, or should it deal normal damage, stop in the body and detonate there, without giving a victim chance for a reflex throw?