Congrats man, your doing so well, 310lbs is 140kgs, 250lbs is 113.3981kgs, 60lbs is 27.21554kgs in seven months keep up the fantastic work.
Everyone is different how long it takes to loss weight, it was a couple of years for me to be able to start shifting the weight that stayed off, as I would lose some put double on, it's hard to find that balance, once I started to find some things which worked the weight melted off.