I keep an old 18" 870 loaded with 000 in the closet in cruiser ready. Wifey knew enough to grab that when the Texas 7 was spotted (and apprehended) in the neighborhood when we lived up in Woodland Park. I have a butt-stock cuff with 3 slugs and 3 00 buck for follow-up shots. I'm not into all the discussion about wound channels and hydrostatic shock, but my thoughts are a faceful of triple-aught will ruin one's day.