Symmetric vs assymetric

[CubsFan]

I'm guessing it varies with different bowlers but as a rule of thumb, what would be the differences as far as reaction between a symmetric core vs. an asymmetric one? Specifically what advantages does one provide over the other?

Thanks in advance for any input.

[J_Mac]

Asymmetric cores allow for finer tuning of the ball reaction.  That can also lead to less room for error when choosing layouts, especially with cores with strong (more than 0.018) asymmetry.

Symmetric balls tend to have a "rounder" reaction to friction while asymmetric pieces can be drilled to transition very quickly.

Food for thought - No drilled bowling ball is truly symmetric.

[Good Times Good Times]

No drilled bowling ball is truly symmetric.

This is a very difficult concept for many to grasp for some reason.

[completebowler]

It shouldn't be. Once you put holes in a ball you knock it out of balance. The deeper the holes into the dense core material the more effect it has. Holes in specific places also have othe effects. Mo demonstrated today on a Yeti that a ball with an undrilled assymetry of .008 (so by USBC definition a symetric ball) that by placing the holes in certain spots that assymetry jumps to over .030.

Very strong....if you know what you're doing.

[CubsFan]

So an asymmetric core would be more prone to having a sharper turn (assuming it has been drilled for that purpose)? Do most good bowlers prefer symmetrical or asymmetrical cores?

Thanks for all the replies.

[kidlost2000]

Dont pay attention to asymmetric vs symmetric. Pay attention to the cover and the balls listed purpose. People get hung up on what they think are factors but really are not.

Everybody had likely read or heard "asymmetrics just dont roll good for me" at least once Im sure. Now look at Track and some of their balls like the 503 505 508 607 706 ect. They have a fairly low MB rating/int diff of .003 .005 .008 .007 .006 ect. Many symmetric s when drilled, especially pin up or pin even with the fingers, will have MB rattings/int diff higher then the balls just listed. When you add a p3 or p4 xhole on many symmetrics you can get an int diff of .020 which is where many of the more aggressive asymmetric cores start.

You can also lower the MB rating/int diff on bowling balls depending on where you put the xhole.