I must have misunderstood.
If you're not looking for "close-range, tactical, home intrusion" scenarios, then yes, a larger bore might make sense. I believe a nice cruiser type Moss 500 or remington, with a short barrel and high-capacity magazine might suit your porposes better. You won't hit what you're aiming at with a hangun in a high-stress situation, without putting a couple of thousand rounds through it first.
A mini-14 or car-15 would also make a good choice of weapon in a stand-off situation. High capacity, high rate of fire, low recoil.
All something to think about.
A gun is a tool. I've used a ratchet as a hammer, but a hammer hammers better!
