Supermo,
Not trying to dis-hearten you, but the position you find yourself in is an all to common one these days. Because reactive balls CAN be made very aggressive, the houses have started using high volumes of oil to combat them, but once the lanes start to dry up, reactive balls can become a bowlers nightmare.
Almost every reactive ball on the market today is going to give you a strong read of dry conditions. Many times my "weaker" equipment goes from a "down & in" shot to swinging the lane in only a few frames due to oil depletion.
However, one of the things I have had luck with is drilling either low flaring equipment or drilling balls with low flare potential drillings ( pin close to axis ). This makes the ball less aggressive by allowing it to roll over the same part of the ball track without flaring onto "fresh" coverstock areas that have no oil on them. I even had a Visionary Granite Gargoyle drilled this way and polished that let me play the track area of the lanes ( around the ten board ) without going instantly left.
I had a lane1 XXXL, but found it not to be the answer unless I had truly DRY lanes and not just spotty, depletion problems as any oil residue tended to stop that ball. If you opt for polyester, I honestly believe an old yellow dot would do as good, or better, due to its softer coverstock.
I will say this. I don't know how you feel about "off" brands, but the Visionary Blue/Green Centaur has been one of the best drier condition balls that I have used. It is still a reactive ball, uses a very mild coverstock with a very mild, low flaring core, doesn't seem to ever "over" react, and seems to carry hits that many other "dry lanes" balls don't, at least for me.
Good luck. Averaging 206 seems to say you have some skills/talent, so don't get frustrated or give up, just look in a direction you haven't had to on oilier conditions.
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