What is not realistic about getting into a situation with multiple attackers?
I wonder if that isn't the norm for muggers, 2-3 guys?
I'm going another way:
The big guns not only have big bullets, but, they have huge boom, blast, and fireball, if loaded with a say, 275 grain bullet, that expands to the size of a two bore rifle.
I was mugged by three guys in a bathroom. In that situation, the stun effect would have been awesome from a .44 magnum or bigger pistol, and, it certainly would have
given me a better chance then being at the mercy of a guy with a Walther PPK/S, that left a scar and about a 9 stich cut in my head.
I also wonder if a .357 magnum, at that range, out of a 360 PD, would have been like a stun grenade, giving me a huge advantage over the little Walther PPK/S the guy hit me over the head with?