Bicycle Mechanics - tire problem

i just replaeced the tires on my 700x23 wheels and get seem to get the bead seated right.i'm no stranger to tire replacing but i just can't seem to get it right.it feels like the wheel is out of round but it isn't. it makes for a very bumpy ride. any help would be appreciated, thanks in advance.

After you mount the tire put about 30 psi in it. The work you way around the wheel and use you thumbs to push the tire away from the bead and insure that it is set at the same point on the bead/side wall all the way around. Do this on both sides. It insures the tire is concentric in its location and also that you are not pinching the tube. The pump to full pressure and check again, looking at both sides. Every tire I have ever used has a molding line just above the bead that is good point to use to see if it is mounted in the same place the full 360 on both sides. You may also have a bad tire. That can happen.

There could be a flaw in how the tire stamping looks. I've had to put a tire in a truing stand to check to see if a tire is installed correctly and isn't out of round.

thanks guys, i'll try both remedies and see what happens.by the way diesel, i love your signature