Below are some bowling tips/ information as a 'general rule'.  They are many factors to the game of bowling and a bowler's style for more help with your specific bowling style, lane conditions, ball equipment / reaction, and more contact USBC Silver certified coach - Jay.

Targeting tips Lane oil depletion Ball Rotation Bowling ball technology    
 link to above youtube video about axis rotation
Link to the above video:        
Kegel Torch Targeting Tool: Contact Jaybird for appointment

    Storm explains bowling ball core. RG/Diff.
& Coverstock