I would guess pitches.  I changed my thumb pitch from 1/8 under palm to 1/8 away.  Since I did so, I lowered my track some.  I think my axis when from 5 7/8, 1/2 up to 5 1/2, 1/2 up.  I would just check to see it this is the case.

andrew
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FUFU
"Act like you've been there before"

sorry dude, 4+ inches is a ton.  A heavy core isn't going to case that much change.  Something is wrong in your delivery, it could be you or something different in how the ball is drilled.

andrew
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FUFU
"Act like you've been there before"

Mine first oil ring moved about an inch lower on my Ultimate when compared to other balls with similar layouts. I have the pin touching the ring finger with the CG stacked below (which is a moderately flaring layout for my axis coordinates. I normally track within 1/4 to 1/2" of the thumbhole on the initial ring, but not with the Ultimate. It is a big flaring ball.

Just wondering if that could be why.
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"Worlds Greatest Ball = Ultimate Inferno"
"Hook Isn't The Key, A Repeatable Consistent Shot Is"
"Increase Your Knowledge, Increase Your Score"
http://www.brunswickbowling.com

I now think it was me, but the drill pattern is the Brunswick "L1" layout.
--------------------
"Worlds Greatest Ball = Ultimate Inferno"
"Hook Isn't The Key, A Repeatable Consistent Shot Is"
"Increase Your Knowledge, Increase Your Score"
http://www.brunswickbowling.com