H1B stamping and reentering before Oct 1st

According to the above post, I can get H1B stamped 90 days before Oct 1st. I am currently working on F1 OPT in the US valid until Dec 9th 2015. I am planning a short trip to home country in July. Once I have my h1b change of status approval notice (through premium processing), can I get h1b visa stamped and return to the U.S. immediately in July using my valid f1opt?Thanks in advance for clarifying this. AVE