If you haven't landed yet, yes you can.
If you have landed with your immigration visa already, your study permit (or any other Canadian visa you have in your passport) is null and void. If you travel before getting your PR card, you should choose one of these options:
1. Apply for a travel document from the Canadian cosulate in your destination country and use it to come back. (takes time!)
2. If you are visiting the US, or you have the option of coming back to Canada via the US, you can cross the border, in a non-commercial vehicle, using your CoPR document and passport.
Also you should know that the PR card is delivered faster than what they say (in most cases 2~3 weeks).