Are my expectations too high?

Update: first time out on a hot August day the car went 12.94 @ 104.19 and the slowest time was a 13.003 @ 103.79 BUT I know there is a lot more in it. The car has a horrible stumble in it off the line that I need to work out and it needs jetted up. The plugs are on the lean side. I was very pleased on how consistent that the car is running within.006 of a second of itself with over 12 passes over a 3 day period at the Mopar Nats.