The Cobalt has easily the most backend of any ball I have thrown, including the One, and many others. I can use this on the same line as my Strike Zone in oil, and just when you think it isn't going to make the turn, it changes direction and recovers nicely.
I have had a difficult time with stone 9's in particular with this ball; it creates such an aggressive angle into the pocket that it just doesn't deflect enough to kick out the 9 in many cases. Last week in league I left 3 in one game (the only game I threw the Cobalt).
You have to give this ball plenty of room. In other words, don't try playing a tight line with it or you will pay full price in the form of thru-the-nose splits.
Mine is drilled stacked with pin over ring. A less aggressive (perhaps label or axis) drill would put this ball in the category of my Dirty Bomb reaction wise.
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LUCK is what happens when preparation meets opportunity.