I agree with Dfaris. For the tasks you described the factory trigger should not be any kind of problem. Buy a lot of ammo and practice as much as you can. Make sure it will feed, fire and eject reliably. While 870 triggers aren't anything like a crisp rifle trigger I've never had one that I felt handicapped my performance with the 870. Be very careful when attempting to breach door hardware. There will be wood and metal shrapnel flying. Everyone around you needs to use protection.
Last edited by drail; February 22, 2011 at 02:14 PM.