I know many of you do that when migrating or moving your Blogger blog to self-hosted WordPress.
According to Blogger Forum, your site could be banned by Google search.
Blogger does not allow the automatic sending of traffic from a Blogger blog to a non Google website.
The reason is spammers could use Blogspot blogs as gateways, and move their spam content around.
They will make use of Blogspot as their "transit zone" to all sorts of gateway blogs.
In other words, Blogger doesn't allow you to simply redirect your Blogger blog straight into a non Blogger website.
I know...
There are many those Blogger-WordPress migration tutorials published by established sites and forums.
But if you still want to follow their advice, you do it at your own risk of losing your Blogger blog for good.
Blogger has stressed that you simply cannot redirect a Blogger blog, using any JavaScript or meta refresh, to do a 301 redirect to any other BlogSpot or non BlogSpot URL.