When should I change balls? What ball?

[vdubtx]

Bowlingball.com shows Optimus as Symmetric.

[vdubtx]

When I am changing balls is because of the entry angle or reaction that the ball is giving me. Typically, if I start to leave a lot of back row pins, then I change balls. Depending on center is whether I go a bit stronger or a bit weaker.

For Sport shots, it will all depend on the length of the pattern as to which ball I will choose to start with. Longer patterns I get my most aggressive ball, shorter get my less aggressive ones. It will also depend on where you need to play on the lanes and line up to make those shots consistently.

[Amyers]

Not to nit pick, but are you SURE the Optimus is asymmetric. I don't believe it is. No Intermediate Differential rating i've ever seen published.

http://www.stormbowling.com/products/balls/optimus

The Optimus could be considered as either. Technically the Optimus is asymmetrical but it's asymmetry is less than .10 which by USBC rules allows the ball to be marketed as symmetrical. I've seen it listed both ways.

[RobLV1]

The Optimus could be considered as either. Technically the Optimus is asymmetrical but it's asymmetry is less than .10 which by USBC rules allows the ball to be marketed as symmetrical. I've seen it listed both ways.

Thank you.

[bobforsaken]

Thanks for the clarification.

[Mike White]

The Optimus could be considered as either. Technically the Optimus is asymmetrical but it's asymmetry is less than .10 which by USBC rules allows the ball to be marketed as symmetrical. I've seen it listed both ways.

USBC has rules on how balls can be marketed???????

[NewToBowling]

Apparently

[Amyers]

USBC has rules on how balls can be marketed???????

Marketed may be the incorrect word. Balls with asymmetry of .010 or greater must have a mark to identify the PSA. .004 to .009 it is optional and below .003 they can not have a PSA mark.