Well I'm at about 430 feet above sea level and according to every chart out there boiling it for 35 minutes says you should be fine based on my elevation but maybe that's just for creating the seal. 🤔 

 Im sure the internet has a definitive answer, Im not an expert in this shit, I just know that when I can long term I use a pressure cooker and go hard.  But I'm probably just being overly cautious