The different grits, as in sandpaper, relate to how fine or small the grooves will be after adjusting the cover. The 4000 will make the 'sanding lines' so minute where as the 500 will make them more pronounced.

Knowing where or at what grit you want a ball will be the toughest part. I'd always start off with the 500, working up to the final grit you have chosen. I'd also suggest to make sure you use the "six side" method that way you know the whole ball is done and should be all the same.

Once you start with say 500, I'd clean the ball well, that way you'll get out/off as much oil and gunk that you can and will end up with an almost new ball. Fine adjustment, say going from 1000 to 2000, I would not start at 500, just make that small adjustment but always clean the ball once you start with whatever grit you decide on, killing two birds with one stone so to speak.


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az guy aka: R & L Bowlers Pro
rlbowlerspro@cox.net
www.rlbowlerspro.com

If you dull up your ball using 500 grit abralon, it will want to read the lane earlier in the oil and hook sooner with more of an arc.  This can be good on heavier oil conditions, but it also can result in the ball expending its energy too early and "rolling out," leaving it with very little hitting power by the time it gets to the pins.  Conversely, sanding it with 4000 grit abralon will make the ball skid through the head oil more, saving its energy for when it encounters friction on the backend by delaying the hook.  This can result in the ball being jumpy when it hits friction, or it can result in the ball hooking too late and leaving 10 pins.  It's all about matching up your game with the lanes you're bowling on to get the right ball reaction for you -- you may need to experiment with different grits to find what works well for you.