I was trying to pass the 10th level of the Sharpshooter challenge, which is to disarm 6 opponents without changing weapons or reloading. This could be a bit tricky, except I noticed when I was using the deadeye mode and taking a shot, it didn't lower my ammo count. I could (and did) take about 10 shots from my 6 shot revolver, one deadeye run at a time, and I still had all my bullets. Made the challenge pretty easy, once I realized it. I assume this is a bug...has anyone else encountered this?