Shooting IDPA is something that I am considering, so I starting thinking about potential ammo choices and was considering subsonic ammo. Currently, I have on hand: Sellier & Bellot 9mm 115 gr FMJ, but have an opportunity to buy S&B 9mm Subsonic 140 gr FMJ at a good price. The Subsonic is almost 50% more than the supersonic 115 gr ammo. That alone makes me feel like it's not worth it. However, I am curious as to whether or not heavy subsonic ammo is really the way to go. In either case, I wouldn't likely go this route until I've improved my game enough to justify "overspending" for ammo. FYI, the 115 is $10/box of 50, the 140Sub is $14.75/box of 50. Thanks!