Opinions about ball position
Ball position is the most misunderstood portion of the entire set-up. There have been many opinions about ball position. Some say one position for every shot, others say move it around depending on the club, such as the callaway x-24 hot irons. All of the guesswork is taken out however if the golfer would set the club at address as the manufacturer designed it. All clubs, except for the Driver, are designed so that the grip end of the club is ahead of the clubhead if soled properly, this means the shaft leans forward, not vertical or backwards! If you address the ball, with say a 5 iron, and the shaft is vertical then even before you swing with callaway x-24 hot irons you've added loft and turned it into a seven iron!
That same 5 iron is designed to have approximately 8 degrees of forward lean at address. The best players in the world, using that same 5 iron, have upwards of 15 degrees at Impact! This turns it into a 3 iron! Having said that you have the option of setting up to the ball with the shaft vertical as long as you can get into the proper Impact position…the shaft leans forward at Impact!