I don't think it's a good idea to "rotate". That being said..... I sometimes carry a .45 Officer's ACP or a Glock 27 instead of my J-frame..... But it's still not a great idea....... As far as my shotgun, I have only ever carried a Remington 870 because I know the drill with that one much better than a Mossberg..... I'm confident enough with my handguns that I feel OK with one of my non-primary guns.....