@essdee1972 et al - Hopefully, inside the apartment you still use a pellet trap, right ? Lead pellet has to hit iron/ steel sheet to flatten it out. Reduces the ricochet - so no broken glass and reduced chances of accidental injuries.
BTW, I have had .22 cal flatheads (Diana) bounce back from wall and wood table (~10m) almost intact and with momentum enough to break a glass.
I fully agree with the suggestion that a bunch of gun-toting novices better operate under adult, err - expert, supervision if shooting outdoors.
BTW, essdee1972, I still await PM reply on your personal experience with SDB and Nieto.