I have a Natural, drilled pin over bridge, CG out 40 deg, surface 4000 abralon.  I am a tweener, 325-250 rpm, usually throw with about 20 deg axis rotation, high track.  While I like the ball on torn up conditions (what I got it for), I have carry issues, the worst being an inordinate number of 8-10s, more than I get with any other ball in the bag.  No 8s, just 8-10s.  I usually roll it straight up 9 or 8.

What's wrong?  Should I apply more rotation?  Go farther outside?  Surface change?  Thanks in advance for any suggestions.

Being a lower revs stroker, my Natural has a more aggressive drill than yours.  I also play an outside line with it.

 I have also suffered from carry issues (mostly 10 pins) until the lanes are very broken down.  None of the usual 10-pin adjustments work (move back a little on the approach, move 1-2 boards right), so I just took the surface down a bit on it hoping that will help (1200 grit sandpaper + compound).  The Bowling This Month review said the ball carries best with flush or high pocket hits, so I'm hoping that extra surface will give me a little stronger angle into the pocket (understanding this is urethane, of course).  If I took mine up to 4000 it'd probably be a spare ball in my hands!

Unfortunately, I just left town for the holidays so I won't be able to report back for awhile.