current specs.. Left hand, 250 rev, 16.5 off the hand, high axis rotation.

the following is primarily, but not totally, a med-hvy oil and up scenario question.

Several years ago I was told by members on this forum whom I trust that with my style of bowling (low rev, high rotation), I would always want a low RG high differential ball. That did and still does make sense to me since my favorite ball at the time was a storm Special Agent. I've always done well with high diff symmetrical balls, which makes sense. Any ball with a high RG lopes down the lane too long and never gets into a roll. Low differential ball are pretty much the same.

It seems to me that these days the vast majority of balls are higher RG and lower differential, but yet they are advertised as big hook balls, which flies in the face of what my style encounters in real life. The answer is either that they are no longer making the type of ball I prefer (few exceptions) or that the cover stock is so dramatically different that I no longer have the low RG high differential qualification requirement.

I should add that I have had nothing but trouble with asymmetric and will only buy symmetric from now on. I know that there are few balls out there like the Motiv Covert Revolt, but there are many others I would like to try based on their rating to give me some help in the rev department, but I just can't see a .047 or so low rg ball revving enough for me.

Which is true?
Thanks in advance

Measuring MOI is indeed, very predictable, whether the rotating mass is close to
its axis of rotation or if it is some distance away from it. The differential "number"
(.048, .060, etc.) matters not in determining MOI. It has more effect on a ball's ability to flare (precess) . For MOI, what matters is the weight of the imbalance coupled with its distance from the axis of rotation.

There are other factors related to a rotating bowling ball such as its angular velocity and torque, and although related, they alone, do not determine a ball's ability to rev up MOI does this perfectly.

Very similar to if each bowling ball was a dark solid color they couldn't tell the difference especially on a house shot

Too many assume everything is absolute or competed in a vacuum...this is why surface is responsible for 70-75% of reaction...if surface doesn't match up properly then 'your' core numbers are irrelevant...more non-strikes are caused by inconsistency of the bowler plus improper surface

^^^ bingo ^^^

I need to play with the same numbers you guys do. 

Let's regroup here........

Higher rg balls "tend" to go longer before going into a roll....
Now do you know why ball companies put higher rg cores into those bowling balls now?
THEY WOULD HOOKOUT at your feet w/ the coverstock on them that are made today..
You put a lower rg (I loved 2.44 to 2.46 cores but they were pearl coverstocks from 15yrs ago) into a coverstock like today it would rollout at the arrows..