Hi,
Movement type 103 will update stock at plant level only. It wont update the stock at storage location level. Hence you cant follow the WM part here. Also, the 103 / 107 is posting to GR blocked stock, not to blocked stock.
While doing GR, you may change the stock type to "blocked" and post the material document. System will create TR which you can convert to TO and proceed with WM procedures.
Regards,
AKPT