Is the pressue reading the only thing that makes you feel shorted? I would ignore that. Is this a tank which was exchanged or did you have your tank filled?It was quite cold this morning, so it might have an effect on it. Hey, I paid the same amount and get maybe 20% less gas, thats not right. Maybe I am wrong, I will check my gauge at home after work, I would think the pressure should stabilize after 10hrs in room temp.