Sometimes you gotta do what you gotta do. Don't remember when or where I read it but it was a woman with small kids armed with a 20 gauge and birdshot who killed a black bear inside her cabin. On Barter Island off the coast of Alaska is an old guy who had to kill a polar bear in his doorway and all he had was a claw hammer.
I use #6 or #4 on turkeys but my HD load is #4 because of the short ranges and occupied bedrooms in my house. Birdshot is for Birds cowboys can come and protect my home for me if they think that is inadequate but if they shot my brother or sister they will wish I had talcum powder and feathers in my 20 gauge instead of #4 turkey loads. This one answer for all contingencies is the result of swallowing dogma they heard from other cowboys and not any real experience.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.