Did you have "force_ssl = true" at one point? That would create a permanent redirect. Clearing your cache will fix that.
Or perhaps you've set the "Strict-Transport-Security" header on that domain? That would also force a redirect to the HTTPS version. To turn that off in chrome, navigate to "chrome://net-internals/#hsts". Then delete that domain. You can query it first, to see if exists in the cache.