Ones choice of ammunition should be determined by the type of construction, proximity to neighbors, etc.
I keep my shotgun loaded with #6 shot. At indoor ranges it's devastating and has a much lower chance of passing through sheetrock and killing my child or my neighbor.
I bought some tactical loads. Its 00 but with a lighter powder charge. Less likely to go through sheet rock but will drop an intruder.
Or my .45 whichever is closer
My thoughts exactly. I keep my shotgun loaded with steel turkey shot. Within the hallways and short distances in my house, turkey shot will still do a lot of damage. 00 and slug, based on the construction of my home, runs too much risk of over penetration.