I think we can rule out the scope, since it has shot equally badly with 2 quality scopes.
If this gun shot sorta ok, I would take the leap and bed it. It does look like that would help some. But it shoots SO poorly that I fear there may be a significant flaw in the barreled action. I would want to have Kimber rule that out before I take the step of bedding it, and in so doing give Kimber a free pass on fixing a problem because I have voided the warranty.
My completely unscientific view of bedding is that it typically cuts the group size by about a third. Sometimes it cuts the group size in half, but that is not common. But this gun appears to be shooting 4" groups. Reducing them by even half is not enough to make this gun a keeper, IMHO.
