The 15-degree rule

[iluvparis]

Yeah it wasn't a huge turner, but then, he was bowling it legally, so you know, there is that.

the doosra that turns like a leg break is only possible if you throw it. And if you experiment you'd be surprised how easy it is to turn the ball both ways once you ignore the 15 degrees

This.

If I bowl left-arm otherdox I can only turn it marginally. But if give it a rip using the 'modern' action all of a sudden I become the second coming of Jesus.

 

[The Captain]

A couple of interesting takes on the 15 degree rule:

http://dennisfreedman.com/art-chucking/

http://dennisfreedman.com/teach-child-bowl-spin-4-easy-steps/