Dude, I'm 6'7" 350 lbs, and I'm 89 Yrs old, and I can hit an 7i 900 yards.....OK as absurd as that sounds...who cares!!!!
As long as you control your game and know your distances you are good. I would rather know that I had a consistent 145 7i, than my typical adjustment. I play a 7i anywhere from 140 to 160, depending on how well I am hitting that day. It usually takes about 3 to 4 holes to gage accurately the distance, and often costs me a few extra shots.
A few months ago I played a friend that took me to school. This guy played the entire round with and 8i, a sand wedge, and a putter and beat me by 4 strokes. He wanted to prove to a buddy of our (and even me) that his course management skills and strategy was more important than the set that you have, or think you need. In full disclosure he is 44, 5'9" and maybe 180 lbs....but he was playing with my wive cheap, no name, and "I wouldn't get caught dead playing with these" clubs.
So go out there and enjoy your game....don't worry about distance too much!