The problem (or advantage) is penetration
I have a Berretta 21 in 22lr. The short barrel severely limits muzzle energy, and leaves a huge flash and report. At about 10 feet the round will only dent a 55 gallon steel drum. Beretta makes a 32 in flip-up barrel that I would be much more comfortable with.
However, since I am a big guy (6'3"), I can carry my full sized Ruger P89 without a problem.
I have a Berretta 21 in 22lr. The short barrel severely limits muzzle energy, and leaves a huge flash and report. At about 10 feet the round will only dent a 55 gallon steel drum. Beretta makes a 32 in flip-up barrel that I would be much more comfortable with.
However, since I am a big guy (6'3"), I can carry my full sized Ruger P89 without a problem.