Hi,

According to the reports it could be predicted that for IISER Pune one must try to score 110+ marks in IAT; and for any of the other IISERs you will have chances only if your score 70+ marks. However for Obc category there are certain reservations which includes

So you may definitely try for the colleges of IISER . However the cutoff varies every year and also statewise. Hoping for the best.  For more information refer to

https://engineering.careers360.com/articles/iiser-admission/amp