I will be moving into an apartment soon and want a revolver to back up my shotgun (with buckshot of course). Thinking 3" in .357 so I can load .38 and .357. Any other caliber recommendations? Barrel Length? I like autos but this way I can leave it loaded and not think about mag spring problems. I know they're not common but I don't want to be the odd guy out. Thanks for any help provided.