:-) Hi jamal,
REMEARMR is right about the use of the shotgun, for gaining entry, it was one of the methods we used in Northern Ireland to gain entry into deralict buildings (danger of booby traps). solid shot was used, usually up to five rounds. We would want to open the door, so the first shot would be to take out the lock, if that didn't work then you would assume that there were bolts and go for them next. In an assault situation you don't fanny about. The 22 Regt guys would have known wether or not the doors had bolts, if yes they would take out the hinges (nagates the lock and bolts) if no bolts then one shot through the lock should do it.
The solid shot cartridge is dark blue
Should make a nice vignette :-)
Mal