Tarded. That 1911 could flatten the whole building in 1 shot with it's mighty 45.
Seriously, room clearing has been done with bolt guns but probably not the most effective way. A 10 round box mag on a Barrett would be devistating inside of a house. 1 shot would literally deafen everyone in the house.
With that said, I'd use a barrett 50 shove it thru a side window, let off all 10 rounds inside the house. Then stroll through the front door with muh 1911.