In 12301 the main problem is its driver and I think that he is not interested to boost the train and thats why it is always running in 120-128 kmph..
Green signal.and in A line permissible upto 140..and. He never utilized that whether 12313 generally uses boosting and madoe it upto 140..,dont blame simran.in..then you also will have some problem with 150+ speed of 12001....lolzz