Have been a speed dominant bowler for many years, but the speed seems to have diminished somewhat (average speed down from approx. 17-19 mph to about 15-17)and with skimpy oil on the lanes recently, I saw a need to fill a gap in my arsenal between the more aggressive stuff (Hammer Raw Anger, Storm Virtual Gravity, Storm Xtreme, etc.) and plastic. So far Track's 607A SE seems to be the answer.
Despite being an experienced bowler, I don't use a lot of the technical terms, but will describe as best I can:
Am right-handed, and ball is drilled pin up (just over the ring finger). Oob finish, 15 lbs, and is a standard drilling (not Sarge Easter, Rico. etc.).
Wanted something similar to my Columbia Bedlam, which this is, but it goes longer and comes back harder. Part of that could be the ball being newer, however I bowled 28 games with it last night (yes... in one night--- a record in excess even for me!), and although the lanes were completely burnt at the end, this ball still got far enough down the lane for a good entry angle and then snapped into the pocket with authority (except at times when the operator got lazy and eased up a bit on the speed**).
**Only caution would be that it hits so hard sometimes that it doesn't mix enough and leaves splits (a few 4-9's). But this was more of a problem in the first 3 or 4 games after which I learned to trust exactly when and where it's break point would occur.
My first Track ball ever, and I love it!
Hope this review is useful despite the lack of technical data.