The Volt was the first high speed disc ever attempted by MVP, the overmold sits differently compared to the flat edged "lid"-like cores of the midranges, they have to get the overmold to flow into the bevel of the fairway cores profile smoothly, which i must say they have done an incredible job.. being that these discs are more consistent than other companies and they have an overmold is AMAZING.. imagine if they didnt have to do overmols, i think the consistency would be out of this world.
I remember an announcements a while back right after the Shocks were released that they made changes across the board to their molding techniques that would yield better consistency with first runs and such from there on out and they have held up to their claims ever since then.
I just pulled out my first run stamped volt and compared it to the newest one i have and they are slightly different, if anything a hairline higher PLH now.. this could be because i have used the one i have now, hardly noticeable and the domes weren't really that different, maybe a little more dome but when sat upside down the disc weight pushes it flat with the old one.. because its such a small dome in the first place, The changes are minute.
Also keep in mind that when you buy discs online the shipping almost ALWAYS flattens the dome completely. I ordered from DN for the new FR Stamp Proton Volt and when it came in the mail it was puddle topped.. i was a little pissed but after a couple days it settled nice and board flat, i like it, its a little more stable than my domier one that i received in a wholesale stacked box order where the domes didnt get abnormally flattened.
Just depends where you get the disc form and how its sent sometimes, in this case its not the manufacturers fault if a dome is flat.. if you can go to a local shop and buy MVP, you can tell that they are just a little more domey because they are shipped with care from MVP.
Whenever i get orders in from MVP the first thing i do is PLH and Dome checks, 9 of 10 are exactly the same with no noticeable differences, white, black and sometimes hot pink (and other weird colors) can be slightly different sometimes but lately they have been just fine.