how much time for visa stamp in losangles

[hmmalik]

i received letter from los angeles consulate to send passport for visa stamp.any body knows knows how much time they take to stamp one time entry.
i am in usa right now.can i enter from my home country in to canada on this visa.
after landing can i come back in us and go again in canada on this visa to receive my pr?

thanx in advance

 

[vault]

Once you get your Passport stamped, you should be able to land in canada either from your home country or from US