Just wondering why the whole Ebonite family uses cores with such lower dynamic numbers in their 16lb eqiupment. Thats just one of the reasons i never buy ebonite, hammer, columbia or track. Trust me theres a lot of stuff they have had out recently or is out now i would love to try but i just cant get over the core numbers compared to 15lb equipment. They seem to be the only company that does this. Just seeing if anyone has a good theory of why they would do it.

I think a bigger issue with Ebonite has always been cover durability.  A former staffer told me that Ebonite shells were thinner than many other manufacturers, and thus didn't hold as much oil before becoming saturated.  Not really sure about that part, but only Ebonite ball I ever owned that didn't die quickly was the Mission. 

Well then if that is the case why wouldn't they just make all the numbers the same because obviously it is hindering me from buying one of their products. Take the Hammer Bad Ass for example in a 15lb the core numbers are 2.48 with a .48 diff and in a 16lb ball they are 2.49 with a .42 diff. As a potential buyer, when  i look at these numbers and look at the price it just seems theres not enough engine there to support the price point. So it does have an effect on potential buyers.

J_Mac:

You are correct. This idea goes back a long time. In the past, the cores had the same differential values, regardless of ball weight. If memory serves me correct, the Brunswick Quantum balls were the first balls to use different cores, depending on
ball weight, in an effort to replicate ball dynamics.

As to Bowlingman's original observation, it appears that Ebonite uses lower differential cores on  most of their 16# balls, when compared to other ball manufacturers. I believe, but I am not sure, that this is due to Ebonite's use of
different coverstock/core materials than some of the other manufacturers .
I do not believe that it diminishes performance .  For example, I have a good friend
who uses the Ebonite family of balls exclusively. He was encouraged to try another
popular "brand". He purchased 4 different pieces from the other company. At the end of the day, neither of us noticed any significant difference in performance, when compared with the Ebonite brands.

In addition, there are times when a particular ball's core specs. will fool you. For example, since I am speed dominant (with a lower rev rate), I never used to have
any luck with high Rg cores. They would simply go too long. As a result, I
avoided balls with Rgs above say, 2.52. At the last Ebonite Demo day, that "theory" changed when I tried the Track Tour X, which has a very high Rg core (2.58).
I was surprised how this ball performed for me. This ball never overshot the breakpoint when in the past, I would've needed another 10 feet of lane to get a 2.58 core to turn the corner regardless of the coverstock.

In contrast, my Columbia Crazy Antics has a larger "motor" (differential), and a much lower RG than the Tour X, but it needs another 5 feet of lane to even begin to think about turning the corner, even after I had tried a multitude of different surface
changes.

So in the end, a ball's specs will give you only a general idea about its expected performance, but until you actually roll it, you can never be certain that the specs.
will live up to your expectations.  There are just too many variables involved-- coverstock strength, core material used, etc, etc.