Check into the Taurus 45/410 revolver.. AKA The Judge.. It has the capability of shooting both the 45 Long Colt and 410 shells.. In fact you can load the thing with 5 410 000Buck and it has 3 45 caliber pellets in each shell. That is 15 bullets.. Also you can go with a number 4 or number 2 shot which won't do much damage thru a wall. You can also load in the first few shells of 410 and follow it up with 45 colts for insurance..