First of all, what you are calling "seams" are actually mold lines from the vulcanization process. In my experience, the most likely cause of your failures is improper installation. If the tire bead is not seated correctly, the tube pressure will eventually force a small section off the rim. The tube then expands out of this bulge until it "splits" with a bang.
After installation, pump it up to 10-15 psi then check to see how it is seating. Most tires have a witness mark around the bead that allows you to gauge even seating. Assuming proper seating, you can then pump it up a bit more and check again. Some tires are just ornery about seating so be gentle with them.