Bicycle Mechanics - New MTB Tires - Uneven Bead set

So I put new 26" Specialized Hemisphere EX s on my MTB rims and the bead is not consistently set on the rims. this is giving me a lurchy bump with every revolution. I've taken them off and remounted them but the problem persists.
My bikeshop guy says they will work them selves in.
The rims are round and true. Any suggestions? These are good tires I don't beleive I would get two rejects, front and back.

I had this problem and three things finally solved the problem.

I used talcum powder on the tire to make the surface more "slippery"
I pumped it partially and worked real hard with my hands to even it out. My thumbs got sore!
I inflated considerably above the maximum pressure (something like 20-30 lbs) and it popped into place.

I would try 1 and 3 first.

THere's been discussion on these forums, but it's hard to search for. You might search on my username because I think I might have posted the same problem as you about a year ago.

Let us know if that helps; others will make suggestions too.

Start off with only a couple psi in the tires and go around the entire rim squeezing the bead with your thumb & index finger. Add a couple more psi & repeat.
Sometimes a bead can hang up on a rim strip & want to stick, or the rim strip gets moved into the bead seating area.
A bit of soapy water may also be useful.
IF the bulge is near the valve stem, you should probably look for the stem interfering.

IT WORKED - - I used a combination of moderately soapy water and inflated the tire to about 100psi (max was 80)
Ping! perfect:)

I also cleaned the inside rim and checked the rim strip.

Thanks everyone for the helpful, commonsense advice.

Great - just for future reference for others: There's no need to make up soapy water. Bike shops for years have used spray cleaners such as Fantastic, 409, etc. They work great, leave almost no residue and help clean your rims at the same time. I've found them good for cleaning residue from brake pads, too and helpful for removing handlebar grips. Just slide a spoke flattened on the end under the grip, spray in the cleaner and moosh around.

I just use an old (cleaned) squeeze mustard bottle with soapy water as part of my bike tools for use on grips & tires. Why spend money on relatively expensive cleaners? Save those for cleaning.

Why spend money on relatively expensive cleaners? Save those for cleaning.

Well, not to be picky, but if that were the only use for those items it would not make sense. However, unlike soapy water I can use it for many tasks around my shop and house.

... the bead is not consistently set on the rims. ... .

I use Tioga bead wax on the bead and contacting area of the rim to reduce friction. It works wonder. Without it, I'd have to over-pressurize the tire (say 65 psi) and wait for the loud snap, which usually startles the bejezzus out of me. With the bead wax, the bead starts to snap in way before I get to the nominal pressure (~45 psi).

I'm running tube tires on a tubeless rim. Tubeless rims rely on a air tight seal at the bead, hence the tight fit.