I know the preference for gun games is the heavy for caliber 147gr. & 150 gr. slower , less recoil loads . Conversely , when you are say a Novice or Marksman class IDPA class shooter - is a 115gr. easy to find , factory load going to make that much of a difference in your scores ? While my preference is heavy for caliber , softer shooting 9mm rounds - I'm thinking at the lower level classifications of IDPA one would have more pressing issues than what weight 9mm bullet weight you are using ? ... Your thoughts ?